Multicast/IGMP Help

[Mabrito]

I am trying to get Multicast imaging working on my Windows Deployment Server. Anything that tries a Multicast transmission from WDS gets stuck in a "waiting" state and then times out and defaults to a unicast transmission....so from what I can tell and research so far...its the network that isnt doing multi-cast right.

I have the WDS server in one VLAN (VLAN 100) and the client workstations in another VLAN (VLAN 108). What exactly needs to be setup? All the VLAN's are configured on a Cisco 3750 (our "core"...its a development lab...not production so it works great) and then the workstations are on a Dell Switch Stack where I have a trunk interface to the 3750 and then the access interfaces tagged with VLAN 108.

I am researching this, but if anyone can point me in the right direction and provide any insight that be great!

 

[cyr0n_k0r]

router(config)# ip multicast-routing
router(config)# interface vlan 108
router(config-if)# ip pim sparse-dense mode

 

[Mabrito]

Hmmm no luck so far with that. I can see the IGMP counters increase:

Vlan102 is up, line protocol is up
Internet address is 10.128.2.254/24
IGMP is enabled on interface
Current IGMP host version is 2
Current IGMP router version is 2
IGMP query interval is 60 seconds
IGMP querier timeout is 120 seconds
IGMP max query response time is 10 seconds
Last member query count is 2
Last member query response interval is 1000 ms
Inbound IGMP access group is not set
IGMP activity: 3 joins, 2 leaves
Multicast routing is enabled on interface
Multicast TTL threshold is 0
Multicast designated router (DR) is 10.128.2.254 (this system)
IGMP querying router is 10.128.2.254 (this system)
Multicast groups joined by this system (number of users):
224.0.1.40(1)

On the VLAN 101 interface (contains the WDS server), it says IGMP is disabled? Shouldnt this be enabled in some fashion?

Vlan101 is up, line protocol is up
Internet address is 10.128.1.254/24
IGMP is disabled on interface
Multicast routing is disabled on interface
Multicast TTL threshold is 0
No multicast groups joined by this system

The only other IGMP command I have enabled on the 3750 is the: ip multicast-routing distributed

 

[Mabrito]

But if I do a "Show IP IGMP Snooping" I see IGMP is enabled globally and on the VLAN's

Global IGMP Snooping configuration:
-------------------------------------------
IGMP snooping : Enabled
IGMPv3 snooping (minimal) : Enabled
Report suppression : Enabled
TCN solicit query : Disabled
TCN flood query count : 2
Robustness variable : 2
Last member query count : 2
Last member query interval : 1000

Vlan 101:
--------
IGMP snooping : Enabled
IGMPv2 immediate leave : Disabled
Multicast router learning mode : pim-dvmrp
CGMP interoperability mode : IGMP_ONLY
Robustness variable : 2
Last member query count : 2
Last member query interval : 1000

Vlan 102:
--------
IGMP snooping : Enabled
IGMPv2 immediate leave : Disabled
Multicast router learning mode : pim-dvmrp
CGMP interoperability mode : IGMP_ONLY
Robustness variable : 2
Last member query count : 2
Last member query interval : 1000


Hmmm.....

 

[Mabrito]

Ah victory!!!

I didnt have a RP designated nor the PIM command on the VLAN interface it seems....once I enabled those two, it is now working!