Troubleshooting Pim - 3Com 7757 Configuration Manual

Troubleshooting PIM

[SW7750-Vlan-interface10] pim sm
[SW7750-Vlan-interface10] quit
[SW7750] interface Vlan-interface 11
[SW7750-Vlan-interface11] pim sm
[SW7750-Vlan-interface11] quit
[SW7750] interface Vlan-interface 12
[SW7750-Vlan-interface12] pim sm
[SW7750-Vlan-interface12] quit
# Configure candidate BSRs.
[SW7750] pim
[SW7750-pim] c-bsr Vlan-interface 10 30
# Configure candidate RPs.
[SW7750] acl number 2000
[SW7750-acl-basic-2000] rule permit source 225.0.0.0 0.255.255.255
[SW7750] pim
[SW7750-pim] c-rp Vlan-interface 10 group-policy 2000
# Configure a PIM domain boundary.
[SW7750] interface Vlan-interface 12
[SW7750-Vlan-interface12] pim bsr-boundary
When Vlan-interface 12 is configured as the PIM domain boundary, LS_D cannot
receive BSR information from LS_B any mote, that is, LS_D is excluded from the
PIM domain.
Configure LS_C
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The configuration on LS_C is similar to the configuration on LS_A.
Symptom 1: The router cannot set up multicast routing tables correctly.
Solution: You can troubleshoot PIM according to the following procedure.
Make sure that the unicast routing is right before troubleshooting PIM.
Because PIM-SM needs the support of RP and BSR, you must execute the
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display pim bsr-info command to see whether BSR information exists. If not,
you must check whether there are unicast routes to the BSR. Then use the
display pim rp-info command to check whether the RP information is right. If
RP information does not exist, you must check whether there are unicast routes
to RP.
Use the display pim neighbor command to check whether the neighboring
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relationship is correctly established.
Troubleshooting PIM 479