Show Ip Route - NEC IP8800/S2400 Series Troubleshooting Manual

3.
Troubleshooting Functional Failures in Operation
No. Troubleshooting Steps and Command
4 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 IGMP to run.
show running-config
5 Check the PIM neighboring information.
show ip pim neighbor
6 Check to see if the unicast route to the multicast data sender
exists.

show ip route

7 Confirm that PIM is running on the interface to the next hop
address for the multicast data sender.
show ip pim interface
8 Confirm that the PIM-SSM group addresses do not contain the
relay target group address, referring to the configuration.
show running-config
9 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 ip pim bsr
10 Confirm that the rendezvous point is determined.
show ip pim rp-mapping
11 Confirm that the rendezvous point group addresses contain the
relay target group address.
show ip pim rp-mapping
12 Confirm that the multicast relay entry exists.
show ip mcache
13 Confirm that the multicast relay routing information exists.
show ip mroute
14 Check to see if multicast routing information or multicast
forwarding entry exceeds the upper limit.
Multicast routing information:
show ip mroute
Multicast forwarding entry:
show ip mcache
netstat multicast
(2) BSR check items
The table below shows the items to be checked when this system is BSR in the IPv4 PIM-SM network configuration.
64
Action
If suppression of protocol packet and multicast packet relay is
provided, correct the configuration.
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 ip pim
interface command.
• Verify the settings of the neighboring router.
If the unicast route does not exist, see
Routing Communication Failure."
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.
If the PIM-SSM group addresses contain the relay target group
address, correct the configuration.
If BSR is not determined, check to see if the unicast route to
BSR exists. If the unicast route does not exist, see
Unicast Routing Communication
If the unicast route exists, check the BSR setting. If the BSR is
this system, see "(2)BSR check items."
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 "3.7 IPv4 Unicast Routing
Communication Failure."
If the unicast route exists, check the rendezvous point setting.
If the rendezvous point is this system, see
point router check items."
If the relay target group address is not contained, check the
rendezvous point setting. If the rendezvous point is this
system, see "(3)Rendezvous point router check
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.
If the multicast routing information does not exist, check the
setting of the downstream router.
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, confirm that there is no terminal
transmitting unnecessary packets.
"3.7 IPv4 Unicast
"3.7 IPv4
Failure."
"(3)Rendezvous
items."