3.Troubleshooting Functional Failures in Operation

Table 3-31: Check Items When Double-relay Continues

No.

Troubleshooting Steps and Command

Action

 

 

 

1

Check the PIM neighboring information on the interface of the

If the neighboring router is not displayed, check the

 

network having multiple routers.

following:

 

show ip pim neighbor

• Confirm that PIM is running on the interface connected to

 

 

the neighboring router using the show ip pim command

 

 

with "interface" parameter specified.

 

 

• Confirm in the configuration that suppression of protocol

 

 

packet relay by filtering, etc. is not provided.

 

 

• Verify the settings of the neighboring router.

 

 

 

3.8.5IPv4 Multicast Communication Failure In VRF [OP-NPAR]

If IPv4 multicast communication failure still continues, check the following:

Table 3-32: Check Items for VRF

No.

Troubleshooting Steps and Command

Action

 

 

 

1

Check to see the VRF interface, port number, VLAN ID.

If the setting is not correct, modify the configuration or the

 

show ip vrf

connections.

 

show vlan

 

 

show ip pim interface

 

2

When this system operates as rendezvous point or BSR,

Specify the same loopback interface number between

 

confirm that loopback interface is set to the VRF or the

rendezvous point/BSR and the VRF.

 

configuration.

Besides, If IPv4 address is not set to the loopback interface,

 

show ip vrf

assign IPv4 address.

 

show running-config

 

3

When multiple VRFs are operating, confirm that global

If you find a specific global network or VRF that occupied

 

network or a specific VRF does not occupy more multicast

more multicast forwarding entries than expected, check to see

 

forwarding entries than expected.

if unexpected multicast relay entry has not been created.

 

show ip mcache vrf all

If much of the negative cache exist in multicast forwarding

 

 

entry, check to see if no terminal transmitting unnecessary

 

 

packets exist. In addition, keep a global network or a specific

 

 

VRF from occupying the forwarding entry.

 

 

Corresponding Configuration:

 

 

ip pim vrf <vrf id> mchache-limit <number>

4

For each VRF, check the items from "3.8.1 Communication on

To confirm technical information by using commands, you

 

IPv4 PIM-SM Network Is Disabled" to "3.8.4 Multicast Data

need to specify VRF. For more information on how to specify

 

Is Double-relayed on IPv4 PIM-SSM Network."

VRF, see the manual "Operation Commands."

 

 

 

70

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NEC IP8800/S2400 manual 5 IPv4 Multicast Communication Failure In VRF OP-NPAR, Check Items When Double-relay Continues
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IP8800/S6700, IP8800/S3600, IP8800/S6600, IP8800/S6300, IP8800/S2400 specifications

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