This section describes the IPv6 commands you use to configure IPv6 on the system and on the interfaces. This section also describes IPv6 management commands and show commands.
ipv6 forwarding
This command enables IPv6 forwarding on the router.
Default: enabled
Format: ipv6 forwarding
Mode: Global Config
no ipv6 forwarding
This command disables IPv6 forwarding on the router
Format: no ipv6 forwarding
Mode: Global Config
ipv6 hop-limit
This command defines the unicast hop count used in ipv6 packets originated by the node. The value is also included in router advertisements. Valid values for hops are 1-64 inclusive. The default "not configured" means that a value of zero is sent in router advertisements and a value of 64 is sent in packets originated by the node. Note that this is not the same as configuring a value of 64.
Default: not configured
Format: ipv6 hop-limit hops
Mode: Global Config
no ipv6 hop-limit
This command returns the unicast hop count to the default.
Format: no ipv6 hop-limit
Mode: Global Config
ipv6 unicast-routing
Use this command to enable the forwarding of IPv6 unicast datagrams.
Default: disabled
Format: ipv6 unicast-routing
Mode: Global Config
no ipv6 unicast-routing
Use this command to disable the forwarding of IPv6 unicast datagrams.
Format: no ipv6 unicast-routing
Mode: Global Config
ipv6 enable
Use this command to enable IPv6 routing on an interface or range of interfaces, including tunnel and loopback interfaces, that has not been configured with an explicit IPv6 address. When you use this command, the interface is automatically configured with a link-local address. You do not need to use this command if you configured an IPv6 global address on the interface.
Default: disabled
Format: ipv6 enable
Mode: Interface Config
no ipv6 enable
Use this command to disable IPv6 routing on an interface.
Format: no ipv6 enable
Mode: Interface Config
ipv6 address
Use this command to configure an IPv6 address on an interface or range of interfaces, including tunnel and loopback interfaces, and to enable IPv6 processing on this interface. You can assign multiple globally reachable addresses to an interface by using this command. You do not need to assign a link-local address by using this command since one is automatically created. The prefix field consists of the bits of the address to be configured. The prefix-length designates how many of the high-order contiguous bits of the address make up the prefix.
You can express IPv6 addresses in eight blocks. Also of note is that instead of a period, a colon now separates each block. For simplification, leading zeros of each 16 bit block can be omitted. One sequence of 16 bit blocks containing only zeros can be replaced with a double colon "::", but not more than one at a time (otherwise it is no longer a unique representation).
Local host: 0000:0000:0000:0000:0000:0000:0000: 0001 becomes ::1
Any host: 0000:0000:0000:0000:0000:0000:0000: 0000 becomes ::
The hexadecimal letters in the IPv6 addresses are not case-sensitive. An example of an IPv6 prefix and prefix length is 3ffe:1::1234/64. The optional [eui-64] field designates that IPv6 processing on the interfaces was enabled using an EUI-64 interface ID in the low order 64 bits of the address. If you use this option, the value of prefix-length must be 64 bits.
Format: ipv6 address prefix/prefix_length [eui64]
Mode: Interface Config
no ipv6 address
Use this command to remove all IPv6 addresses on an interface or specified IPv6 address. The prefix parameter consists of the bits of the address to be configured. The prefix-length designates how many of the high-order contiguous bits of the address comprise the prefix.The optional [eui-64] field designates that IPv6 processing on the interfaces was enabled using an EUI-64 interface ID in the low order 64 bits of the address. If you do not supply any parameters, the command deletes all the IPv6 addresses on an interface.
Format: no ipv6 address [prefix/prefix_length] [eui64]
Mode: Interface Config
ipv6 address dhcp
This command enables the DHCPv6 client on an in-band interface so that it can acquire network information, such as the IPv6 address, from a network DHCP server.
Default: disabled
Format: ipv6 address dhcp
Mode: Interface Config
no ipv6 address dhcp
This command releases a leased address and disables DHCPv6 on an interface.
Format: no ipv6 address dhcp
Mode: Interface Config
ipv6 route
Use this command to configure an IPv6 static route. The ipv6-prefix is the IPv6 network that is the destination of the static route. The prefix-length is the length of the IPv6 prefix — a decimal value (usually 0-64) that shows how many of the high-order contiguous bits of the address comprise the prefix (the network portion of the address). A slash mark must precede the prefix-length. The next-hop-address is the IPv6 address of the next hop that can be used to reach the specified network. Specifying Null0 as nexthop parameter adds a static reject route. The preference parameter is a value the router uses to compare this route with routes from other route sources that have the same destination. The range for preference is 1–255, and the default value is 1. You can specify a unit/slot/port or tunnel tunnel_id interface to identify direct static routes from point-to-point and broadcast interfaces. The interface must be specified when using a link-local address as the next hop. A route with a preference of 255 cannot be used to forward traffic.
Use this command to delete an IPv6 static route. Use the command without the optional parameters to delete all static routes to the specified destination. Use the preference parameter to revert the preference of a route to the default preference.
This command sets the default distance (preference) for IPv6 static routes. Lower route distance values are preferred when determining the best route. The ipv6 route command allows you to optionally set the distance (preference) of an individual static route. The default distance is used when no distance is specified in this command.
Changing the default distance does not update the distance of existing static routes, even if they were assigned the original default distance. The new default distance will only be applied to static routes created after invoking the ipv6 route distance command.
Default: 1
Format: ipv6 route distance 1-255
Mode: Global Config
no ipv6 route distance
This command resets the default static route preference value in the router to the original default preference. Lower route preference values are preferred when determining the best route.
Format: no ipv6 route distance
Mode: Global Config
ipv6 mtu
This command sets the maximum transmission unit (MTU) size, in bytes, of IPv6 packets on an interface or range of interfaces. This command replaces the default or link MTU with a new MTU value.
NOTE: The default MTU value for a tunnel interface is 1480. You cannot change this value.
Default: 0 or link speed (MTU value (1500))
Format: ipv6 mtu 1280-1500
Mode: Interface Config
no ipv6 mtu
This command resets maximum transmission unit value to default value.
Format: no ipv6 mtu
Mode: Interface Config
ipv6 nd dad attempts
This command sets the number of duplicate address detection probes transmitted on an interface or range of interfaces. Duplicate address detection verifies that an IPv6 address on an interface is unique.
Default: 1
Format: ipv6 nd dad attempts 0 - 600
Mode: Interface Config
no ipv6 nd dad attempts
This command resets to number of duplicate address detection value to default value.
Format: no ipv6 nd dad attempts
Mode: Interface Config
ipv6 nd managed-config-flag
This command sets the "managed address configuration" flag in router advertisements on the interface or range of interfaces. When the value is true, end nodes use DHCPv6. When the value is false, end nodes automatically configure addresses.
Default: false
Format: ipv6 nd managed-config-flag
Mode: Interface Config
no ipv6 nd managed-config-flag
This command resets the "managed address configuration" flag in router advertisements to the default value.
Format: no ipv6 nd managed-config-flag
Mode: Interface Config
ipv6 nd ns-interval
This command sets the interval between router advertisements for advertised neighbor solicitations, in milliseconds. An advertised value of 0 means the interval is unspecified. This command can configure a single interface or a range of interfaces.
Default: 0
Format: ipv6 nd ns-interval {1000-4294967295 | 0}
Mode: Interface Config
no ipv6 nd ns-interval
This command resets the neighbor solicit retransmission interval of the specified interface to the default value.
Format: no ipv6 nd ns-interval
Mode: Interface Config
ipv6 nd other-config-flag
This command sets the "other stateful configuration" flag in router advertisements sent from the interface.
Default: false
Format: ipv6 nd other-config-flag
Mode: Interface Config
no ipv6 nd other-config-flag
This command resets the "other stateful configuration" flag back to its default value in router advertisements sent from the interface.
Format: no ipv6 nd other-config-flag
Mode: Interface Config
ipv6 nd ra-interval
This command sets the transmission interval between router advertisements on the interface or range of interfaces.
Default: 600
Format: ipv6 nd ra-interval-max 4- 1800
Mode: Interface Config
no ipv6 nd ra-interval
This command sets router advertisement interval to the default.
Format: no ipv6 nd ra-interval-max
Mode: Interface Config
ipv6 nd ra-lifetime
This command sets the value, in seconds, that is placed in the Router Lifetime field of the router advertisements sent from the interface or range of interfaces. The lifetime value must be zero, or it must be an integer between the value of the router advertisement transmission interval and 9000. A value of zero means this router is not to be used as the default router.
Default: 1800
Format: ipv6 nd ra-lifetime lifetime
Mode: Interface Config
no ipv6 nd ra-lifetime
This command resets router lifetime to the default value.
Format: no ipv6 nd ra-lifetime
Mode: Interface Config
ipv6 nd reachable-time
This command sets the router advertisement time to consider a neighbor reachable after neighbor discovery confirmation. Reachable time is specified in milliseconds. A value of zero means the time is unspecified by the router. This command can configure a single interface or a range of interfaces.
Default: 0
Format: ipv6 nd reachable-time 0–4294967295
Mode: Interface Config
no ipv6 nd reachable-time
This command means reachable time is unspecified for the router.
Format: no ipv6 nd reachable-time
Mode: Interface Config
ipv6 nd suppress-ra
This command suppresses router advertisement transmission on an interface or range of interfaces.
Default: disabled
Format: ipv6 nd suppress-ra
Mode: Interface Config
no ipv6 nd suppress-ra
This command enables router transmission on an interface.
Format: no ipv6 nd suppress-ra
Mode: Interface Config
ipv6 nd prefix
Use the ipv6 nd prefix command to configure parameters associated with prefixes the router advertises in its router advertisements. The first optional parameter is the valid lifetime of the router, in seconds. You can specify a value or indicate that the lifetime value is infinite. The second optional parameter is the preferred lifetime of the router.
This command can be used to configure a single interface or a range of interfaces. The router advertises its global IPv6 prefixes in its router advertisements (RAs). An RA only includes the prefixes of the IPv6 addresses configured on the interface where the RA is transmitted. Addresses are configured using the ipv6 nd prefix interface configuration command. Each prefix advertisement includes information about the prefix, such as its lifetime values and whether hosts should use the prefix for on-link determination or address auto-configuration. Use the ipv6 nd prefix command to configure these values.
The ipv6 nd prefix command allows you to preconfigure RA prefix values before you configure the associated interface address. In order for the prefix to be included in RAs, you must configure an address that matches the prefix using the ipv6 address command. Prefixes specified using ipv6 nd prefix without associated interface address will not be included in RAs and will not be committed to the device configuration.
This command sets prefix configuration to default values.
Format: no ipv6 nd prefix prefix/prefix_length
Mode: Interface Config
ipv6 unreachables
Use this command to enable the generation of ICMPv6 Destination Unreachable messages on the interface or range of interfaces. By default, the generation of ICMPv6 Destination Unreachable messages is enabled.
Default: enable
Format: ipv6 unreachables
Mode: Interface Config
no ipv6 unreachables
Use this command to prevent the generation of ICMPv6 Destination Unreachable messages.
Format: no ipv6 unreachables
Mode: Interface Config
ipv6 icmp error-interval
Use this command to limit the rate at which ICMPv6 error messages are sent. The rate limit is configured as a token bucket, with two configurable parameters, burst-size and burst-interval. The burst-interval specifies how often the token bucket is initialized with burst-size tokens. burst-interval is from 0 to 2147483647 milliseconds (msec). The burst-size is the number of ICMPv6 error messages that can be sent during one burst-interval. The range is from 1 to 200 messages. To disable ICMP rate limiting, set burst-interval to zero (0).
Use the no form of the command to return burst-interval and burst-size to their default values.
Format: no ipv6 icmp error-interval
Mode: Global Config
show ipv6 brief
Use this command to display the IPv6 status of forwarding mode and IPv6 unicast routing mode.
Format: show ipv6 brief
Mode: Privileged EXEC
IPv6 Forwarding Mode: Shows whether the IPv6 forwarding mode is enabled.
IPv6 Unicast Routing Mode: Shows whether the IPv6 unicast routing mode is enabled.
IPv6 Hop Limit: Shows the unicast hop count used in IPv6 packets originated by the node. For more information, see "ipv6 hop-limit".
ICMPv6 Limit Error Rate Interval: Shows how often the token bucket is initialized with burst-size tokens. For more information, see "ipv6 icmp error-interval".
ICMPv6 Rate Limit Burst Size: Shows the number of ICMPv6 error messages that can be sent during one burst-interval. For more information, see "ipv6 icmp error-interval".
Maximum Routes: Shows the maximum IPv6 route table size.
show ipv6 interface
Use this command to show the usability status of IPv6 interfaces and whether ICMPv6 Destination Unreachable messages may be sent.
Format: show ipv6 interface {brief | unit/slot/port}
Mode: Privileged EXEC
If you use the brief parameter, the following information displays for all configured IPv6 interfaces:
Interface: The interface in unit/slot/port format.
IPv6 Operational Mode: Shows whether the mode is enabled or disabled.
IPv6 Address/Length: Shows the IPv6 address and length on interfaces with IPv6 enabled.
If you specify an interface, the following information also appears.
Routing Mode: Shows whether IPv6 routing is enabled or disabled.
IPv6 Enable Mode: Shows whether IPv6 is enabled on the interface.
Administrative Mode: Shows whether the interface administrative mode is enabled or disabled.
Bandwidth: Shows bandwidth of the interface.
Interface Maximum Transmission Unit: The MTU size, in bytes.
Router Duplicate Address Detection Transmits: The number of consecutive duplicate address detection probes to transmit.
Address Autoconfigure Mode: Shows whether the autoconfigure mode is enabled or disabled.
Address DHCP Mode: Shows whether the DHCPv6 client is enabled on the interface.
Router Advertisement NS Interval: The interval, in milliseconds, between router advertisements for advertised neighbor solicitations.
Router Advertisement Lifetime: Shows the router lifetime value of the interface in router advertisements.
Router Advertisement Reachable Time: The amount of time, in milliseconds, to consider a neighbor reachable after neighbor discovery confirmation.
Router Advertisement Interval: The frequency, in seconds, that router advertisements are sent.
Router Advertisement Managed Config Flag: Shows whether the managed configuration flag is set (enabled) for router advertisements on this interface.
Router Advertisement Other Config Flag: Shows whether the other configuration flag is set (enabled) for router advertisements on this interface.
Router Advertisement Suppress Flag: Shows whether router advertisements are suppressed (enabled) or sent (disabled).
IPv6 Destination Unreachables: Shows whether ICMPv6 Destination Unreachable messages may be sent (enabled) or not (disabled). For more information, see "ipv6 unreachables".
IPv6 Default Router: Shows the IPv6 address of the default router.
If an IPv6 prefix is configured on the interface, the following information also appears.
IFPv6 Prefix is: The IPv6 prefix for the specified interface.
Preferred Lifetime: The amount of time the advertised prefix is a preferred prefix.
Valid Lifetime: The amount of time the advertised prefix is valid.
Onlink Flag: Shows whether the onlink flag is set (enabled) in the prefix.
Autonomous Flag: Shows whether the autonomous address-configuration flag (autoconfig) is set (enabled) in the prefix.
show ipv6 interface vlan
Use the show ipv6 interface vlan in Privileged EXEC mode to show to show the usability status of IPv6 VLAN interfaces.
Format: show ipv6 interface vlan vlan-id [prefix]
Mode: Privileged EXEC\User EXEC
vlan-id: Valid VLAN ID
prefix: Display IPv6 Interface Prefix Information
show ipv6 dhcp interface
This command displays a list of all IPv6 addresses currently leased from a DHCP server on a specific in-band interface.
Format: show ipv6 dhcp[interface unit/slot/port]
Modes: Privileged EXEC
Mode: Displays whether the specified interface is in Client mode or not.
State: State of the DHCPv6 Client on this interface.The valid values are: INACTIVE, SOLICIT, REQUEST, ACTIVE, RENEW, REBIND, RELEASE.
Server DUID: DHCPv6 Unique Identifier of the DHCPv6 Server on this interface.
T1 Time: The T1 time specified by the DHCPv6 server. After the client has held the address for this length of time, the client tries to renew the lease.
T2 Time: The T2 time specified by the DHCPv6 server. If the lease renewal fails, then when the client has held the lease for this length of time, the client sends a Rebind message to the server.
Interface IAID: An identifier for an identity association chosen by this client.
Leased Address: The IPv6 address leased by the DHCPv6 Server for this interface.
Preferred Lifetime: The preferred lifetime of the IPv6 address, as defined in RFC 2462.
Valid Lifetime: The valid lifetime of the IPv6 address, as defined by RFC 2462.
Renew Time: The time until the client tries to renew the lease
Expiry Time: The time until the address expires.
show ipv6 neighbor
Use this command to display information about the IPv6 neighbors.
Format: show ipv6 neighbor
Mode: Privileged EXEC
Interface: The interface in unit/slot/port format.
IPv6 Address: IPV6 address of neighbor or interface.
MAC Address: Link-layer Address.
IsRtr: Shows whether the neighbor is a router. If the value is TRUE, the neighbor is known to be a router, and FALSE otherwise. A value of FALSE might not mean Note that routers are not always known to be routers.
Neighbor State: State of neighbor cache entry. Possible values are Incomplete, Reachable, Stale, Delay, Probe, and Unknown.
Last Updated: The time in seconds that has elapsed since an entry was added to the cache.
clear ipv6 neighbors
Use this command to clear all entries IPv6 neighbor table or an entry on a specific interface. Use the unit/slot/port parameter to specify the interface.
Format: clear ipv6 neighbors [unit/slot/port]
Mode: Privileged EXEC
show ipv6 route
This command displays the IPv6 routing table The ipv6-address specifies a specific IPv6 address for which the best-matching route would be displayed. The ipv6-prefix/ipv6-prefix length specifies a specific IPv6 network for which the matching route would be displayed. The interface specifies that the routes with next-hops on the interface be displayed. The protocol specifies the protocol that installed the routes. The protocol is one of the following keywords: connected, open, static. The all specifies that all routes including best and non-best routes are displayed. Otherwise, only the best routes are displayed.
NOTE: If you use the connected keyword for protocol, the all option is not available because there are no best or non-best connected routes.
Route Codes: The key for the routing protocol codes that might appear in the routing table output.
The show ipv6 route command displays the routing tables in the following format:
Codes: C - connected, S - static, O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF Ext 1, OE2 - OSPF Ext 2, ON1 - OSPF NSSA Ext Type 1, ON2 - OSPF NSSA Ext Type 2
The columns for the routing table display the following information:
Code: The code for the routing protocol that created this routing entry.
Default Gateway: The IPv6 address of the default gateway. When the system does not have a more specific route to a packet's destination, it sends the packet to the default gateway.
IPv6-Prefix/IPv6-Prefix-Length: The IPv6-Prefix and prefix-length of the destination IPv6 network corresponding to this route.
Preference/Metric: The administrative distance (preference) and cost (metric) associated with this route. An example of this output is [1/0], where 1 is the preference and 0 is the metric.
Tag: The decimal value of the tag associated with a redistributed route, if it is not 0.
Next-Hop: The outgoing router IPv6 address to use when forwarding traffic to the next router (if any) in the path toward the destination.
Route-Timestamp: The last updated time for dynamic routes. The format of Route-Timestamp will be
Days:Hours:Minutes if days > = 1
Hours:Minutes:Seconds if days < 1
Interface: The outgoing router interface to use when forwarding traffic to the next destination. For reject routes, the next hop interface would be Null0 interface.
To administratively control the traffic destined to a particular network and prevent it from being forwarded through the router, you can configure a static reject route on the router. Such traffic would be discarded and the ICMP destination unreachable message is sent back to the source. This is typically used for preventing routing loops. The reject route added in the RTO is of the type OSPF Inter-Area. Reject routes (routes of REJECT type installed by any protocol) are not redistributed by OSPF/RIP. Reject routes are supported in both OSPFv2 and OSPFv3.
show ipv6 route preferences
Use this command to show the preference value associated with the type of route. Lower numbers have a greater preference. A route with a preference of 255 cannot be used to forward traffic.
Format: show ipv6 route preferences
Mode: Privileged EXEC
Local: Preference of directly-connected routes.
Static: Preference of static routes.
OSPF Intra: Preference of routes within the OSPF area.
OSPF Inter: Preference of routes to other OSPF routes that are outside of the area.
OSPF External: Preference of OSPF external routes.
show ipv6 route summary
This command displays the summary of the routing table. Use to display the count summary for all routes, including best and non-best routes. Use the command without parameters to display the count summary for only the best routes.
Format: show ipv6 route summary [all]
Modes: Privileged EXEC\User EXEC
Connected Routes: Total number of connected routes in the routing table.
Static Routes: Total number of static routes in the routing table.
OSPF Routes: Total number of routes installed by OSPFv3 protocol.
Reject Routes: Total number of reject routes installed by all protocols.
Number of Prefixes: Summarizes the number of routes with prefixes of different lengths.
Total Routes: The total number of routes in the routing table.
show ipv6 vlan
This command displays IPv6 VLAN routing interface addresses.
Format: show ipv6 vlan
Modes: Privileged EXEC\User EXEC
MAC Address used by Routing VLANs: Shows the MAC address.
The rest of the output for this command is displayed in a table with the following column headings:
VLAN ID: The VLAN ID of a configured VLAN.
Logical Interface: The interface in unit/slot/port format that is associated with the VLAN ID.
IPv6 Address/Prefix Length: The IPv6 prefix and prefix length associated with the VLAN ID.
show ipv6 traffic
Use this command to show traffic and statistics for IPv6 and ICMPv6. Specify a logical, loopback, or tunnel interface to view information about traffic on a specific interface. If you do not specify an interface, the command displays information about traffic on all interfaces.
Total Datagrams Received: Total number of input datagrams received by the interface, including those received in error.
Received Datagrams Locally Delivered: Total number of datagrams successfully delivered to IPv6 user-protocols (including ICMP). This counter increments at the interface to which these datagrams were addressed, which might not necessarily be the input interface for some of the datagrams.
Received Datagrams Discarded Due To Header Errors: Number of input datagrams discarded due to errors in their IPv6 headers, including version number mismatch, other format errors, hop count exceeded, errors discovered in processing their IPv6 options, etc.
Received Datagrams Discarded Due To MTU: Number of input datagrams that could not be forwarded because their size exceeded the link MTU of outgoing interface.
Received Datagrams Discarded Due To No Route: Number of input datagrams discarded because no route could be found to transmit them to their destination.
Received Datagrams With Unknown Protocol: Number of locally-addressed datagrams received successfully but discarded because of an unknown or unsupported protocol. This counter increments at the interface to which these datagrams were addressed, which might not be necessarily the input interface for some of the datagrams.
Received Datagrams Discarded Due To Invalid Address: Number of input datagrams discarded because the IPv6 address in their IPv6 header's destination field was not a valid address to be received at this entity. This count includes invalid addresses (for example, ::0) and unsupported addresses (for example, addresses with unallocated prefixes). For entities which are not IPv6 routers and therefore do not forward datagrams, this counter includes datagrams discarded because the destination address was not a local address.
Received Datagrams Discarded Due To Truncated Data: Number of input datagrams discarded because datagram frame didn't carry enough data.
Received Datagrams Discarded Other: Number of input IPv6 datagrams for which no problems were encountered to prevent their continue processing, but which were discarded (e.g., for lack of buffer space). Note that this counter does not include datagrams discarded while awaiting re-assembly.
Received Datagrams Reassembly Required: Number of IPv6 fragments received which needed to be reassembled at thi interface. Note that this counter increments at the interface to which these fragments were addressed, which might not be necessarily the input interface for some of the fragments.
Datagrams Successfully Reassembled: Number of IPv6 datagrams successfully reassembled. Note that this counter increments at the interface to which these datagrams were addressed, which might not be necessarily the input interface for some of the fragments.
Datagrams Failed To Reassemble: Number of failures detected by the IPv6 reassembly algorithm (for whatever reason: timed out, errors, etc.). Note that this is not necessarily a count of discarded IPv6 fragments since some algorithms (notably the algorithm in by combining them as they are received. This counter increments at the interface to which these fragments were addressed, which might not be necessarily the input interface for some of the fragments.
Datagrams Forwarded: Number of output datagrams which this entity received and forwarded to their final destinations. In entities which do not act as IPv6 routers, this counter will include only those packets which were Source-Routed via this entity, and the Source-Route processing was successful. Note that for a successfully forwarded datagram the counter of the outgoing interface increments.
Datagrams Locally Transmitted: Total number of IPv6 datagrams which local IPv6 user-protocols (including ICMP) supplied to IPv6 in requests for transmission. Note that this counter does not include any datagrams counted in ipv6IfStatsOutForwDatagrams.
Datagrams Transmit Failed: Number of output IPv6 datagrams for which no problem was encountered to prevent their transmission to their destination, but which were discarded (e.g., for lack of buffer space). Note that this counter would include datagrams counted in ipv6IfStatsOutForwDatagrams if any such packets met this (discretionary) discard criterion.
Fragments Created: Number of output datagram fragments that have been generated as a result of fragmentation at this output interface.
Datagrams Successfully Fragmented: Number of IPv6 datagrams that have been successfully fragmented at this output interface.
Datagrams Failed To Fragment: Number of IPv6 datagrams that have been discarded because they needed to be fragmented at this output interface but could not be.
Multicast Datagrams Received: Number of multicast packets received by the interface.
Multicast Datagrams Transmitted: Number of multicast packets transmitted by the interface.
Total ICMPv6 messages received: Total number of ICMP messages received by the interface which includes all those counted by ipv6IfIcmpInErrors. Note that this interface is the interface to which the ICMP messages were addressed which may not be necessarily the input interface for the messages.
ICMPv6 Messages with errors: Number of ICMP messages which the interface received but determined as having ICMP-specific errors (bad ICMP checksums, bad length, etc.).
ICMPv6 Destination Unreachable Messages: Number of ICMP Destination Unreachable messages received by the interface.
ICMPv6 Messages Prohibited Administratively: Number of ICMP destination unreachable/communication administratively prohibited messages received by the interface.
ICMPv6 Time Exceeded Messages: Number of ICMP Time Exceeded messages received by the interface.
ICMPv6 Parameter Problem Messages: Number of ICMP Parameter Problem messages received by the interface.
ICMPv6 messages with too big packets: Number of ICMP Packet Too Big messages received by the interface.
ICMPv6 Echo Request Messages Received: Number of ICMP Echo (request) messages received by the interface.
ICMPv6 Echo Reply Messages Received: Number of ICMP Echo Reply messages received by the interface.
ICMPv6 Router Solicit Messages Received: Number of ICMP Router Solicit messages received by the interface.
ICMPv6 Router Advertisement Messages Received: Number of ICMP Router Advertisement messages received by the interface.
ICMPv6 Neighbor Solicit Messages Received: Number of ICMP Neighbor Solicit messages received by the interface.
ICMPv6 Neighbor Advertisement Messages Received: Number of ICMP Neighbor Advertisement messages received by the interface.
ICMPv6 Redirect Messages Received: Number of Redirect messages received by the interface.
Transmitted: Number of ICMPv6 Group Membership Query messages received by the interface.
Total ICMPv6 Messages Transmitted: Total number of ICMP messages which this interface attempted to send. Note that this counter includes all those counted by icmpOutErrors.
ICMPv6 Messages Not Transmitted Due To Error: Number of ICMP messages which this interface did not send due to problems discovered within ICMP such as a lack of buffers. This value should not include errors discovered outside the ICMP layer such as the inability of IPv6 to route the resultant datagram. In some implementations there may be no types of error which contribute to this counter's value.
ICMPv6 Destination Unreachable Messages Transmitted: Number of ICMP Destination Unreachable messages sent by the interface.
ICMPv6 Messages Prohibited Administratively Transmitted: Number of ICMP destination unreachable/communication administratively prohibited messages sent.
ICMPv6 Time Exceeded Messages Transmitted: Number of ICMP Time Exceeded messages sent by the interface.
ICMPv6 Parameter Problem Messages Transmitted: Number of ICMP Parameter Problem messages sent by the interface.
ICMPv6 Packet Too Big Messages Transmitted: Number of ICMP Packet Too Big messages sent by the interface.
ICMPv6 Echo Request Messages Transmitted: Number of ICMP Echo (request) messages sent by the interface.ICMP echo messages sent.
ICMPv6 Echo Reply Messages Transmitted: Number of ICMP Echo Reply messages sent by the interface.
ICMPv6 Router Solicit Messages Transmitted: Number of ICMP Router Solicitation messages sent by the interface.
ICMPv6 Router Advertisement Messages Transmitted: Number of ICMP Router Advertisement messages sent by the interface.
ICMPv6 Neighbor Solicit Messages Transmitted: Number of ICMP Neighbor Solicitation messages sent by the interface.
ICMPv6 Neighbor Advertisement Messages Transmitted: Number of ICMP Neighbor Advertisement messages sent by the interface.
ICMPv6 Redirect Messages Received: Number of Redirect messages sent. For a host, this object will always be zero, since hosts do not send redirects.
ICMPv6 Group Membership Query Messages Received: Number of ICMPv6 Group Membership Query messages sent.
ICMPv6 Group Membership Response Messages Receiveda: Number of ICMPv6 Group Membership Response messages sent.
ICMPv6 Group Membership Reduction Messages Receivedb: Number of ICMPv6 Group Membership Reduction messages sent.
ICMPv6 Duplicate Address Detects: Number of duplicate addresses detected by the interface.
a. ICMPv6 Group Membership Response Messages are supported in VxWorks but are not supported in Linux.
b. ICMPv6 Group Membership Reduction Messages are not supported in Linux but are supported in VxWorks.
clear ipv6 statistics
Use this command to clear IPv6 statistics for all interfaces or for a specific interface, including loopback and tunnel interfaces. IPv6 statistics display in the output of the show ipv6 traffic command. If you do not specify an interface, the counters for all IPv6 traffic statistics reset to zero.
