NEC IP8800/S3600 Manuale Utente

3.   

Troubleshooting Functional Failures in Operation

82

(2) BSR check items

The table below shows the items to be checked when this system is BSR in the IPv6 PIM-SM network configuration.

5

Confirm in the configuration that suppression of protocol 
packet and multicast packet relay through filtering, etc. is not 
provided on the interface that allows PIM and MLD to run. 
show running-config

If suppression of protocol packet and multicast packet relay is 
provided, correct the configuration.

6

Check the PIM neighboring information.
show ipv6 pim neighbor

If the neighboring router is not displayed, check the 
following:
• Confirm that PIM is running on the interface connected to 

the neighboring router using the show ipv6 pim 
command with "interface" parameter specified.

• Verify the settings of the neighboring router.

7

Check to see if the unicast route to the multicast data sender 
exists.
show ipv6 route

If the unicast route does not exist, see "

8

Confirm that PIM is running on the interface to the next hop 
address for the multicast data sender.
show ipv6 pim interface

If PIM is not running, check the configuration. Set PIM to run 
on the interface connected to the next hop address for the 
multicast data sender.

9

Confirm that the PIM-SSM group addresses do not contain the 
relay target group address, referring to the configuration.
show running-config

If the PIM-SSM group addresses contain the relay target 
group address, correct the configuration.

10

Confirm that BSR is determined. However, this confirmation 
is not required if the rendezvous point for the relay target group
address is a static rendezvous point.
show ipv6 pim bsr

If BSR is not determined, check to see if the unicast route to 
BSR exists. If the unicast route does not exist, see "

."

If the unicast route exists, check the BSR setting. If the BSR 
is this system, see "

11

Confirm that the rendezvous point is determined.
show ipv6 pim rp-mapping

If the rendezvous point is not determined, check to see if the 
unicast route to the rendezvous point exists. If the unicast 
route does not exist, see "

If the unicast route exists, check the rendezvous point setting.
If the rendezvous point is this system, see "

12

Confirm that the rendezvous point group addresses contain the 
relay target group address.
show ipv6 pim rp-mapping

If the relay target group address is not contained, check the 
rendezvous point setting.

13

Confirm that the multicast relay entry exists.
show ipv6 mcache

If the multicast relay entry does not exist, confirm that 
multicast data has arrived at the upstream port. If multicast 
data has not arrived, check the setting of the multicast sender 
or upstream router.

14

Confirm that the multicast routing information exists.
show ipv6 mroute

If the multicast routing information does not exist, check the 
setting of the downstream router.

15

Confirm that multicast routing information or multicast
forwarding entry does not exceed the upper limit.
Multicast routing information:
 show ip mroute
Multicast forwarding entry:
 show ip mcache
 netstat multicast

When warning is output, confirm that unexpected multicast
routing information or unexpected multicast forwarding entry
has not been created. If much of the negative cache exists in
multicast forwarding entry, check to see if no terminal
transmitting unnecessary packets exist.

No.

Troubleshooting Steps and Command

Action