Multicast - PIM troubleshooting

[Sarah_Seidl]

Hello,
We have a location where our tech is reporting he cannot ghost image a computer lab (roughly 20 PCs). At that site we have a core of x670v-48x and x460-48p switches. Code is at 15.5.3.4 patch 1-5

We have pim setup in this fashion:

configure pim add vlan "IDF" sparse
configure pim add vlan "MDF" sparse
configure pim add vlan "JVloop" sparse
configure pim crp vlan "JVloop" "RP-list" 30
enable pim
configure pim cbsr vlan "JVloop"

When I issue the show pim command; I see the BSR elected and all the appropriate vlans rifms, with the JVloop rifmsc

Our RP-list.pol file is
entry rp-list { if match any{
}
then {
nlri 239.0.0.0/8;
nlri 224.0.0.0/8;
}
}

Igmp Snooping Flag : forward-all-routerIgmp Snooping Flood-list : none
Igmp Snooping Proxy : Enable
Igmp Snooping Filters : per-port

As a test, our tech plugged all the computers into a dumb switch and was able to mulitcast fine. He cannot multicast when he's connected to the extreme stack. When he is connected to the extreme stack, the clients are able to join the ghost server, but when he hits send to send them their images, it just spins then fails.

I've done the old stare and compare with other sites where I have been told multi-casting works fine, and I can't see a configuration difference.

I guess I'm looking for suggestions on what to try / tweak / look for?

Thank you

[Michael_Suggs1]

im no PIM guru by any means, but if you run this command do you see the join request?

TOC-X460.24 # sh pim cache 224.1.100.21
Index Dest Group Source InVlan Origin
[0000] 224.1.100.21 192.168.1.1 (WR) Cspire-Chicago Sparse
Entry timer is not run; UpstNbr: 10.1.0.1
EgressIfList = Video-10Gig(0)(FW)(DM)(N)

[0001] 224.1.100.21 10.99.2.4 (S) Cspire-Chicago Sparse
Expires after 186 secs UpstNbr: 10.1.0.1
RP: 192.168.1.1 via 10.1.0.1 in Cspire-Chicago
EgressIfList = Video-10Gig(0)(FW)(DM)(N)

is the PC on the same subnet as the network. vlan?

if so you may try this command to the multicast he is pulling. basically forcing a join.

configure igmp snooping vlan "Cspire-Chicago" ports 34 add static group 224.1.2.21

is there a route to the source of the MC?

show iproute
#s 192.168.1.1/32 10.1.0.1 1 UG---S-um--f- Cspire-Chicago 194d:11h:31m:6s

hope some of these ideas will help,

[Sarah_Seidl]

Thank you, I'll coordinate with our tech and schedule time to look at what you recommended.