32.2.3 IPv6 PIM-SM confirmation of information

The following are the types of information you can check in the IPv6 multicast routing information for the Switch when the PIM-SM functionality is set.

<Structure of this section>

(1) Interface information

The following describes the checking that is performed by executing the show ipv6 pim interface command.

Figure 32-9: Result of executing show ipv6 pim interface command
> show ipv6 pim interface Date 20XX/08/01 15:20:00 UTC Interface Component Vif Nbr Hello DR This Count Intvl Address System VLAN0001 PIM-SM 1 2 30 fe80::200:87ff:fe10:a95a Y (Omitted below)

Check whether the execution results include the expected interface name. If the expected interface name is not included, IPv6 PIM-SM is not running on the interface. In configuration mode, make sure that IPv6 PIM is enabled on that interface. In addition, check whether a failure has occurred on the interface.
Check the Nbr Count value (number of neighboring PIM routers) for the target interface. If this value is 0, neighboring routers either do not exist, or are not reporting PIM hello messages. Check the neighboring routers.

(2) Neighbor information

Execute the show ipv6 pim neighbor command to check for the presence of neighbors for the target interface. If a particular neighbor does not exist, the neighboring routers might not be reporting PIM Hello messages. Check the neighboring routers.

Figure 32-10: Result of executing show ipv6 pim neighbor command
> show ipv6 pim neighbor Date 20XX/08/01 15:20:00 UTC Neighbor Address Interface Uptime Expires fe80::200:87ff:feb0:1234 VLAN0001 00:05 01:40 fe80::200:87ff:fea0:abcd VLAN0001 00:05 01:40 (Omitted below)

Figure 32-10: Result of executing show ipv6 pim neighbor command

> show ipv6 pim neighbor
Date 20XX/08/01 15:20:00 UTC
Neighbor Address         Interface Uptime Expires
fe80::200:87ff:feb0:1234 VLAN0001  00:05  01:40
fe80::200:87ff:fea0:abcd VLAN0001  00:05  01:40
(Omitted below)

[Figure Data]

(3) Source route information

Execute the show ipv6 rpf command to check sender routing information.

Figure 32-11: Result of executing show ipv6 rpf command
> show ipv6 rpf 2001:db8::100 Date 20XX/08/01 15:20:00 UTC Incoming: VLAN0002 Upstream: fe80::1 (Omitted below)

(4) PIM-SM BSR info

Execute the show ipv6 pim bsr command and check whether the BSR address is displayed. If ---- is displayed, the BSR might not be sending bootstrap messages, or might not exist. Check the BSR. Note that BSRs cannot be used for PIM-SSM.

Figure 32-12: Result of executing show ipv6 pim bsr command
> show ipv6 pim bsr Date 20XX/08/01 15:20:00 UTC Status : Not Candidate Bootstrap Router BSR Address : 2001:db8::1 Priority: 100 Hash mask length: 30 Uptime : 03:00 Bootstrap Timeout : 130 seconds >

(5) PIM-SM rendezvous point data

Execute the show ipv6 pim rp-mapping command to make sure that the C-RP address is displayed for the corresponding IPv6 multicast group address. If it is not displayed, the BSR might not be sending bootstrap messages, or the rendezvous point or BSR might not exist. Check the rendezvous point and BSR. Note that rendezvous points cannot be used for PIM-SSM.

Figure 32-13: Result of executing show ipv6 pim rp-mapping command
> show ipv6 pim rp-mapping brief Date 20XX/08/01 15:20:00 UTC Status : Not Candidate Rendezvous Point Total: 2 routes, 2 groups, 1 RP Group/Masklen C-RP Address ff15:200::/64 2001:db8::1 ff15:100::/32 2001:db8::1 >

Figure 32-13: Result of executing show ipv6 pim rp-mapping command

> show ipv6 pim rp-mapping brief
Date 20XX/08/01 15:20:00 UTC
Status : Not Candidate Rendezvous Point
Total: 2 routes, 2 groups, 1 RP
Group/Masklen                  C-RP Address
ff15:200::/64                  2001:db8::1
ff15:100::/32                  2001:db8::1
>

(6) PIM-SM routing info

Execute the show ipv6 mroute command to check whether a path to the corresponding destination address exists. If no (S,G) entry exists, check whether a (*,G) entry exists. If no (*,G) entry exists, and both incoming and outgoing are invalid, check the neighboring router. Note that (*,G) cannot be used for PIM-SSM, since it does not exist.

Figure 32-14: Displaying PIM-SM multicast route information
> show ipv6 mroute Date 20XX/04/20 15:20:00 UTC Total: 4 routes, 2 groups, 2 sources (S,G) 2 routes -------------------------------------------------- Group Address Source Address ff15:100::50 2001:db8::100 uptime 02:00 expires 02:30 assert 00:00 flags F protocol SM incoming: VLAN0002 upstream: Direct reg-sup: 30s outgoing: VLAN0003 uptime 02:30 expires --:-- ff15:200::1 2001:db8::200 uptime 02:00 expires 02:30 assert 00:00 flags F protocol SM incoming: VLAN0001 upstream: Direct reg-sup: 30s outgoing: VLAN0003 uptime 02:30 expires --:-- (*,G) 2 routes -------------------------------------------------- Group Address RP Address ff15:100::50 2001:db8::1 uptime 02:00 expires --:-- assert 00:00 flags R protocol SM incoming: VLAN0001 upstream: This System outgoing: VLAN0003 uptime 02:30 expires --:-- ff15:200::1 2001:db8::2 uptime 02:00 expires --:-- assert 00:00 flags R protocol SM incoming: VLAN0001 upstream: fe80::1200:87ff:fe10:1234 outgoing: VLAN0003 uptime 02:30 expires --:-- VLAN0004 uptime 02:30 expires --:-- >

Figure 32-14: Displaying PIM-SM multicast route information

> show ipv6 mroute
Date 20XX/04/20 15:20:00 UTC
Total: 4 routes, 2 groups, 2 sources
 
(S,G) 2 routes  --------------------------------------------------
Group Address                       Source Address
ff15:100::50                        2001:db8::100
    uptime 02:00    expires 02:30    assert 00:00    flags F  protocol SM
    incoming: VLAN0002       upstream: Direct  reg-sup: 30s
    outgoing: VLAN0003  uptime 02:30    expires --:--
 
ff15:200::1                         2001:db8::200 
    uptime 02:00    expires 02:30    assert 00:00    flags F  protocol SM
    incoming: VLAN0001       upstream: Direct  reg-sup: 30s
    outgoing: VLAN0003  uptime 02:30    expires --:--
 
(*,G) 2 routes  --------------------------------------------------
Group Address                       RP Address
ff15:100::50                        2001:db8::1
    uptime 02:00    expires --:--    assert 00:00    flags R  protocol SM
    incoming: VLAN0001       upstream: This System
    outgoing: VLAN0003  uptime 02:30    expires --:--
 
ff15:200::1                         2001:db8::2
    uptime 02:00    expires --:--    assert 00:00    flags R  protocol SM
    incoming: VLAN0001       upstream: fe80::1200:87ff:fe10:1234
    outgoing: VLAN0003  uptime 02:30    expires --:--
              VLAN0004  uptime 02:30    expires --:--
>