NEC IP8800/S6300 User Manual
3.
Troubleshooting Functional Failures in Operation
70
Table 3-31: Check Items When Double-relay Continues
3.8.5
IPv4 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 the PIM neighboring information on the interface of the
network having multiple routers.
show ip pim neighbor
network having multiple routers.
show ip pim neighbor
If the neighboring router is not displayed, check the
following:
• Confirm that PIM is running on the interface connected to
following:
• Confirm that PIM is running on the interface connected to
the neighboring router using the show ip pim command
with "interface" parameter specified.
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.
No.
Troubleshooting Steps and Command
Action
1
Check to see the VRF interface, port number, VLAN ID.
show ip vrf
show vlan
show ip pim interface
show ip vrf
show vlan
show ip pim interface
If the setting is not correct, modify the configuration or the
connections.
connections.
2
When this system operates as rendezvous point or BSR,
confirm that loopback interface is set to the VRF or the
configuration.
show ip vrf
show running-config
confirm that loopback interface is set to the VRF or the
configuration.
show ip vrf
show running-config
Specify the same loopback interface number between
rendezvous point/BSR and the VRF.
Besides, If IPv4 address is not set to the loopback interface,
assign IPv4 address.
rendezvous point/BSR and the VRF.
Besides, If IPv4 address is not set to the loopback interface,
assign IPv4 address.
3
When multiple VRFs are operating, confirm that global
network or a specific VRF does not occupy more multicast
forwarding entries than expected.
show ip mcache vrf all
network or a specific VRF does not occupy more multicast
forwarding entries than expected.
show ip mcache vrf all
If you find a specific global network or VRF that occupied
more multicast forwarding entries than expected, check to see
if unexpected multicast relay entry has not been created.
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>
more multicast forwarding entries than expected, check to see
if unexpected multicast relay entry has not been created.
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 "
" to "
."
To confirm technical information by using commands, you
need to specify VRF. For more information on how to specify
VRF, see the manual "Operation Commands."
need to specify VRF. For more information on how to specify
VRF, see the manual "Operation Commands."