Technical Documentation

Monitoring the Current State of IPv6 Routing Tables

Purpose

Display the current state of the routing table, including routes not used for forwarding. You can display all routes, a specific route, detailed information about all or a specific route, or summary counters for the routing table.

You must configure an IPv6 license using the license ipv6 command before using the IPv6 routing protocol configuration commands on the E Series router.
All IPv6 routing protocol-related configurations are removed from the virtual router when you issue the no ipv6 command.

Action

To display current state of all routes in the routing table:

host1#show ipv6 route
         Prefix/Length            Type   Dst/Met         Intf
-------------------------------- ------- ------- --------------------
1::/16                           Connect 0/0     loopback1
5::/64                           Connect 0/0     ATM4/0.15
6::/64                           Static  1/0     ATM4/0.15
2003::/16                        Static  1/0     ATM4/0.15

To display summary information of all routes in the routing table:

host1#show ipv6 route summary
Unicast routes:
8 total routes, 576 bytes in route entries
0 isis routes
0 rip routes
3 static routes
2 connected routes
1 bgp routes
0 ospf routes
2 other internal routes
0 access routes
0 internally created access host routes

Last route added/deleted: 2::4/128 by BGP
At MON FEB 04 2008 14:18:25 UTC

Unicast routes used only for Multicast RPF check:
0 total routes, 0 bytes in route entries
0 isis routes
0 rip routes
0 staroughtic routes
0 connected routes
0 bgp routes
0 ospf routes
0 other internal routes
0 access routes
0 internally created access host routes
0 mbgp routes 
0 dvmrp routes

Last route added/deleted: null by Invalid
At MON FEB 04 2008 14:18:04 UTC

MPLS tunnel routes (not used for forwarding):
3 total routes, 216 bytes in route entries
1 bgp tunnel routes
1 ldp tunnel routes
1 rsvp tunnel routes

Last route added/deleted: 2::4/128 by BGP Tunnel
At MON FEB 04 2008 14:18:26 UTC

To display the detailed information about the specific route:

host1#show ipv6 route 5::/64 detail 
5::/64 Type: Static Distance: 1 Metric: 0 Tag: 1234 Class: 0
        NextHop: 1::2  IntfIndex 10007 Intf ATM4/0.15

Meaning

Table 1 lists the show ipv6 route command output fields.

Table 1: show ipv6 route Output Fields

Field Name	Field Description
Prefix	IPv6 address prefix
Length	Prefix length
Type	Protocol type (possible route types include: Bgp, Connect, Idrp, Igrp, Invalid, Isis, Ndisc, Ospf, Other, Rip, Static)
Dst (or Distance)	Administrative distance for the route
Met (or Metric)	Number of hops
Intf	Interface type and interface specifier
Tag	Route tag assigned for the static route
NextHop	The configured next hop address for this interface
IfIndex	An autogenerated value for the next hop interface

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