11-28-2007 09:02 AM - edited 03-05-2019 07:41 PM
We have a Ghost cast server and whenever a multicast session from a client starts, this switch gets disconnected and comes back after the session is over. any idea why this happens..
3548 is connected to a 3550 to which the ghost case server is connected. 3 more 2950s are connected to the 3550 from where the client sessions gets intiated.
Trunk port config given below:-
3550:-
interface FastEthernet0/48
description XCONN-2-SW4
switchport access vlan 230
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 230,235,260
switchport mode trunk
speed 100
duplex full
no cdp enable
3548:-
interface FastEthernet0/48
description XCONN-2-SW1
duplex full
speed 100
switchport access vlan 230
switchport trunk encapsulation dot1q
switchport mode trunk
no cdp enable
11-28-2007 10:31 AM
How does IGMP helps multicast problem. Before enabling, want some opinions on it..
11-28-2007 01:07 PM
IGMP is a protocol between a receiver and a router, and it enables the receiving host to tell the router that it is interested in a certain multicast stream. Without it, the router would not forward the stream (sparse mode), or would cut off the stream after a certain time (dense mode).
IGMP snooping is a feature on a switch. Without it, the switch floods all multicasts to all ports. With IGMP snooping, the switch does not flood multicasts except where it has seen a host that says (IGMP) that it is interested in the multicast stream.
Kevin Dorrell
Luxembourg
11-28-2007 01:10 PM
In my case, if i enable IGMP globally will it help or would it be better if i go by vlan wise snooping.
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