show ipv6 nd ra
Syntax
show ipv6 nd ra
show ipv6 nd ra prefixvlan
vid
Description
Without the optional keywords, this command displays the global and per-VLAN, and per tunnel router advertisement neighbor discovery configuration on a specific routing switch. This indicates the per-VLAN or per-tunnel content of RAs transmitted from the routing switch.
Options
prefix
Displays the prefixes, valid lifetime, and onlink/auto values advertised by the routing switch on all VLANs or tunnels configured for RA operation.
prefix vlan vid
Displays values for each prefix configured using
ipv6 nd ra prefix
on the specified VLAN or tunnel.IPv6 Prefix
Displays values for specific prefixes configured for RAs on a VLAN or tunnel by the
ipv6 nd ra prefix
command, plusDefault
(to apply to any global unicast prefixes on the same VLAN(s) or tunnel(s) that have not been configured byipv6 nd ra prefix
).Valid Lifetime
The valid lifetime configured for the indicated prefix.
Preferred Lifetime
The preferred lifetime configured for the indicated prefix.
On-link Flag
Indicates whether the prefix is advertised as on-link.
Default: On; On-link enabled.
Autonomous Flag
Indicates whether address autoconfiguration is turned on.
Default: On; Autoconfiguration enabled.
Advertise Flag
Indicates whether advertisement for the subject prefix is turned on.
Default: On.
Example output
General Output Listing the RA Configuration on a Routing Switch
Switch(config)# show ipv6 nd ra IPv6 Router Advertisement Configuration Global RA Suppress : No Global Hop Limit : 10 IPv6 Unicast Routing : Enabled Interface Supp Interval Lifetime Mngd Other RCH Time NS Intrvl Hop ID RA Min/Max (sec) Flag Flag (ms) (ms) Limit --------- ---- -------- -------- ---- ----- -------- ------- ----- vlan-1 Yes 200/600 1800 No No 0 0 10 vlan-22 No 200/600 1800 No No 0 0 10 tunnel-3 Yes 200/600 1000 No No 0 0 4
Output where specific prefixes have been configured for RAs
Switch(tunnel-3)# ipv6 nd ra prefix default 1296000 1209600 Switch(config)# show ipv6 nd ra prefix IPv6 Neighbor Discovery Prefix Information VLAN Name : VLAN22 IPv6 Prefix Valid Lifetime Onlink/Auto ---------------------------- ------------------- ----------- Default Infinite On/On 2001:db8:0:a::/64 1h:20m:44s Off/On Tunnel Name : Tunnel3 IPv6 Prefix Valid Lifetime Onlink/Auto ---------------------------- ------------------- ----------- Default 15 days On/On
Detailed prefix configuration data for a specific VLAN
Switch(config)# show ipv6 nd ra prefix vlan 30 IPv6 Neighbor Discovery Prefix Information VLAN Name : VLAN30 IPv6 Prefix : Default Valid Lifetime : Infinite Preferred Lifetime : Infinite On-link Flag : On Autonomous Flag : On Advertise Flag : On IPv6 Prefix : 2001:db8:f:1b::/64 Valid Lifetime : 11/31/2010 00:00:01 Preferred Lifetime : 11/01/2010 00:00:01 On-link Flag : Off Autonomous Flag : On Advertise Flag : On IPv6 Prefix : 2001:db8:f:1d::/64 Valid Lifetime : 11/31/2010 00:00:01 Preferred Lifetime : 11/01/2010 00:00:01 On-link Flag : On Autonomous Flag : On Advertise Flag : On