ProCurve 2910 Muticast config - is this correct? igmp snooping?

[amarranca]

Hello all, I have a procurve 2910 that is NOT doing any IP routing. I have a Cisco router the next hop up as everyones default gateway and thats the multicast router as well.

Can you confirm this is correct for a multicast config on the procuve which all my users are connected to?

vlan 1
name "DEFAULT_VLAN"
untagged 1-42,44-48
ip address 172.16.24.250 255.255.255.0
no untagged 43
ip igmp high-priority-forward
exit
vlan 10
name "Voice"
untagged 43
qos priority 7
ip helper-address 172.16.24.5
ip address 10.10.10.250 255.255.255.0
tagged 1-42,44-45
voice
ip igmp high-priority-forward
exit

igmp-proxy-domain "voice" 172.16.24.254 239.192.17.60 239.192.17.62


Thats it for igmp config!

After reading some forums it was found out I need to enable igmp snooping, can the procuve 2910 do this? Is the config correct?

My multicast isnt working and I think it might be something with the HP

P.S. This thread has been moved from Switches, Hubs, Modems (Legacy ITRC forum) to ProCurve / ProVision-Based.
-HP Forum Moderator

[Antonio Milanese]

Hi,

enable igmp on affected vlans but disable querier capabilitity since you have a upstream router and want to avoid querier schizophrenia;
...and ofcorse a good reading is multicast guide =)

http://www.hp.com/rnd/support/manuals/2910-chapters.htm#Traffic

Best regards,

Antonio

[amarranca]

Hi Antonio,

based on my provided config isnt that what I have done?

igmp is enabled on the vlans

(even though you cant see it, the HP is not the querying switch)

[Mohammed Faiz]

Hi,

The "ip igmp" command enables IGMP snooping on your switch. Your config should be fine if, as you say, you're not routing anything on your 2910 (the igmp-proxy-domain command shouldn't be necessary unless you are using routing).
What is the output of "show ip igmp" from your 2910, is it seeing the correct querier and groups?

[Antonio Milanese]

Hi ammaranca,

Mohammed is correct!

you need "ip igmp" activate "full" IGMP operations i.e. "snooping" since you shuold treat those switches as L2 devices when ip and multicast routing are disabled..
L2 igmp operations (with some IGMPv3 "corner cases" on "smart IGMP" swichtes) depends on snooping.
Indeed "ip igmp high-priority-forward" does actually activate igmp (smart=)? on configuration..yes not obvious..and if you ask me disrespectful of the natural order of things(tm):)

anyway AFAICR without snooping and/or querier on L2 segment the switch does reports suppression with pruning instead of proxy-reporting to mrouter in PIM-SM..

So my natural order of things(tm) are:

"ip igmp"
"no ip igmp querier"
"ip igmp high-priority-forward"

By the way which version of IGMP / PIM ?

Best regards,
Antonio

[amarranca]

2910al-48G-PoE# sh ip igmp

Status and Counters - IP Multicast (IGMP) Status

VLAN ID : 1
VLAN Name : DEFAULT_VLAN
Querier Address : 172.16.24.254

Active Group Addresses Reports Queries Querier Access Port
---------------------- ------- ------- -------------------
224.0.1.24 2434 1946 47
224.0.1.40 4871 4869 47
224.0.1.60 15338 6780 47
239.192.17.61 1397 1164 47
239.255.255.250 188746 6893 47
239.255.255.254 2471 1946 47

VLAN ID : 10
VLAN Name : Voice
Querier Address : 10.10.10.1

Active Group Addresses Reports Queries Querier Access Port
---------------------- ------- ------- -------------------
239.192.17.62 1370 1370 43

2910al-48G-PoE#

[amarranca]

After analyzing some wireshark captures it appears my IP phones are sending an IGMP join request coming from an address of 255.255.255.255 INSTEAD of their actual IP (10.10.10.x)

Im pitching this back to the PBX vendor as Im fairly sure my configs are correct.

[churchhouse]

Hi

Did you get anywhere with this in the end?

I have a similar problem routing between vlan1 and vlan20 at present.

Config:

Running configuration:

; J9146A Configuration Editor; Created on release #W.15.08.0012
; Ver #02:11.05:16
hostname "2910al_London"
module 1 type j9146a
power-over-ethernet pre-std-detect
ip authorized-managers 172.19.0.0 255.255.0.0 access manager
ip authorized-managers 192.168.2.0 255.255.255.0 access manager
ip authorized-managers 192.168.3.0 255.255.255.0 access manager
ip authorized-managers 172.16.0.0 255.255.0.0 access manager
ip default-gateway 192.168.100.254
no ip icmp redirects
ip route 0.0.0.0 0.0.0.0 192.168.3.1
ip route 0.0.0.0 0.0.0.0 192.168.100.254
ip routing
interface 1
   name "vlan01 only"
   no power-over-ethernet
   exit
interface 2
   name "to asa on fe0/1 (vlan20)"
   no power-over-ethernet
   exit
snmp-server community "public" unrestricted
snmp-server contact "IT" location "London"
vlan 1
   name "DEFAULT_VLAN"
   no untagged 2-24
   untagged 1
   ip address 192.168.3.4 255.255.255.0
   ip igmp
   exit
vlan 20
   name "Voice"
   untagged 2-24
   ip address 192.168.100.1 255.255.255.0
   ip igmp
   exit
primary-vlan 20
no autorun
password manager
password operator