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07-26-2010 12:45 AM
07-26-2010 12:45 AM
strange gmp snooping on 3com 5500G-EI
we are running MS NLB on Windows 2008r2 in "igmp multicast" mode.
so, windows servers are sending igmp queries to network and commutators are supposed to limit multicast traffic only to subscribed ports. however, 3com 5500G-EI does see igmp groups:
<5500G-EI>display igmp-snooping group
Total 8 IP Group(s).
Total 8 MAC Group(s).
Vlan(id):1.
Total 8 IP Group(s).
Total 8 MAC Group(s).
Static Router port(s):
Dynamic Router port(s):
IP group(s):the following ip group(s) match to one mac group.
IP group address:239.255.6.254
Static host port(s):
Dynamic host port(s):
GigabitEthernet5/0/5 GigabitEthernet6/0/46
MAC group(s):
MAC group address:0100-5e7f-06fe
Host port(s):GigabitEthernet5/0/5 GigabitEthernet6/0/46
IP group(s):the following ip group(s) match to one mac group.
IP group address:239.255.7.193
Static host port(s):
Dynamic host port(s):
GigabitEthernet1/0/29 GigabitEthernet1/0/31
GigabitEthernet1/0/46 GigabitEthernet2/0/3
---- More ----
but it treats multicast traffic as broadcast and sends it to all available ports.
what did we do wrong ?
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07-26-2010 12:45 AM
07-26-2010 12:45 AM
Re: strange gmp snooping on 3com 5500G-EI
we are running MS NLB on Windows 2008r2 in "igmp multicast" mode.
so, windows servers are sending igmp queries to network and commutators are supposed to limit multicast traffic only to subscribed ports. however, 3com 5500G-EI does see igmp groups:
<5500G-EI>display igmp-snooping group
Total 8 IP Group(s).
Total 8 MAC Group(s).
Vlan(id):1.
Total 8 IP Group(s).
Total 8 MAC Group(s).
Static Router port(s):
Dynamic Router port(s):
IP group(s):the following ip group(s) match to one mac group.
IP group address:239.255.6.254
Static host port(s):
Dynamic host port(s):
GigabitEthernet5/0/5 GigabitEthernet6/0/46
MAC group(s):
MAC group address:0100-5e7f-06fe
Host port(s):GigabitEthernet5/0/5 GigabitEthernet6/0/46
IP group(s):the following ip group(s) match to one mac group.
IP group address:239.255.7.193
Static host port(s):
Dynamic host port(s):
GigabitEthernet1/0/29 GigabitEthernet1/0/31
GigabitEthernet1/0/46 GigabitEthernet2/0/3
---- More ----
but it treats multicast traffic as broadcast and sends it to all available ports.
what did we do wrong ?
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07-29-2010 03:07 PM
07-29-2010 03:07 PM
Re: strange gmp snooping on 3com 5500G-EI
up
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08-01-2010 09:49 AM
08-01-2010 09:49 AM
Re: strange gmp snooping on 3com 5500G-EI
up