Multicast pb

[DamianS]

Hello To all:
I have a configuration for a DECT system and it requires to do this configuration on my Procurve 2910al switches.
below is what is needed as config on the switch

1. Spanning Tree: disable Spanning Tree on port used by DAP
2. IP Multicast: enable and set to “Fast Forward” Mode
3. IGMP Snooping & IGMP Query Mode: disable

How can I configure this on the Procurve since these options exist on 3COM.

Thanks in advanced

[DamianS]

Note that there is no fast forward on Procurve. i found only forward mode.
and i have MSTP enabled already on all my switches so how can i disable spanning tree on some ports on the switch?
i searched a lot without finding a hint about disabling IGMP query or snooping.
note that to enable multicat, i had to enable IGMP that was disabled by default/
thanks a lot for your help

[Shadow13 · Accepted solution]

for the ports connected to the DAP issue the following
#no spanning-tree admin-edge-port
#no spanning-tree auto-edge-port

For IGMP Query it's disabled by default when you enable IGMP, it will be enabled if you configured an IP address under the vlan where you have enabled IGMP on the switch.
If you have IP address under the vlan then issue the command
#no ip igmp querier.

For "Fast Forward" i'm not sure but check the below:

high-priority-forward

â   [no] vlan VLAN-ID ip igmp high-priority-forward
Usage: [no] ip igmp high-priority-forward
Description: Enable/disable the high priority forwarding of traffic for
subscribed IP Multicast groups. This feature is configured on
a per-VLAN basis.

[DamianS]

Thanks a lot for replying thast fast.
I will try these commands now.
I have an IP an that VLAN only on my core switch, however on the edges the vlan is without IP addresses. you mean i should run this command to disable igmp query only where i have an IP on the specific vlan?
what abt igmp snooping?
the high priority is for the vlan and not for the ports right?
thanks dude for your help

[Shadow13]

Yes as per the desc. it per VLAN,

For Query:

â   [no] interface vlan VLAN-ID ip igmp querier
Usage: [no] ip igmp querier [interval ]
Description: Specify querier/non-querier capability for the VLAN. IGMP
queries are not sent when the mode is disabled. When
enabled, the device cannot become Querier for the subnet
unless the VLAN has an IP Address (use the 'show ip' command
to determine this). Each subnet must have at least one IGMP
Querier-capable device in order for IGMP to function
properly. The querier interval setting modifies the time (in
seconds) between IGMP queries.


For Snooping am not sure, but you can check the CLI guide for the 5400 switches, the commands are almost the same for all ProCurve switches, it's availabe on with the other manuals. check the link below
http://cdn.procurve.com/training/Manuals/3500-5400-6200-8200-CLI-K_14_09.pdf

[DamianS]

Thx again dude but unfortunately i am still having the same multicast error on the DAP system.
it's giving me errors in the log:
- port high collision or drop rate
- excessive crc/alignement errors
- duplex mismatch. reconfig port to auto
although the DAP requirements is 100-full duplex for the port where it is connected.
do you think spanning tree is causing this? because it's mentioned to disable spanning tree for the ports where DAP is connected.
disabling IGMP query and snooping
enabling multicast on fast forward.
any ideas?
thanks a lot

[Shadow13]

- port high collision or drop rate
This might mean duplex mismatch

- excessive crc/alignement errors
Bad cablings

So i would recommend 1st check the cables, check the speed-duplex on both ends and since you are sure that the DAP run on 100-full duplex then configure the switch to 100-auto and on the DAP also the same and you have to make sure that this is done.

[Shadow13]

one more thing. configure the port connected to the DAP with BPDU filtering :
BPDU filtering allows control of spanning-tree participation on a per-port basis. When enabled on a port, it excludes
this port from any spanning-tree participation: the port will ignore spanning-tree BPDUs and stay locked in â forwardingâ
state.

#spanning-tree bpdu-filter

[DamianS]

Thx a lot for your time spent helping me.
I tried the bpdu filter on the ports where the DAP is connected, however. i am still getting the multicast error.
and what i did is i've tested the cabling using the Fluke cable anlayzer and i got a pass results.
does disabling spanning tree on some ports
affect the switch performance? is it safe to do it? because MSTP is a must in my configuration and I configured it all along with vrrp and it's working fine.
thanks again dude

[Shadow13]

actually there is no command to disable spanning tree per port :)

Have you checked the speed-duplex settings on both ends ? make sure both are set to 100-auto not AUTO