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CGMP vs IGMP
18 years 8 months ago #13878
by qster
CGMP vs IGMP was created by qster
What are the main differences between IGMP and CGMP?
18 years 8 months ago #13881
by TheBishop
Replied by TheBishop on topic IGMP and CGMP
Both manage the switching of multicast traffic:
Internet Group Management Protocol (IGMP) is the standard protocol to manage multicast transmissions passing to routed ports. One of the problems with IGMP is if a VLAN on a switch is set to 'receive' then all the workstations on that VLAN will get the multicast stream. Cisco Group Management Protocol (CGMP) is a Cisco proprietary protocol extension which controls the flow of multicast streams to individual VLAN members. This solves the above problem. IGMP must also be running on the router for CGMP to work.
Internet Group Management Protocol (IGMP) is the standard protocol to manage multicast transmissions passing to routed ports. One of the problems with IGMP is if a VLAN on a switch is set to 'receive' then all the workstations on that VLAN will get the multicast stream. Cisco Group Management Protocol (CGMP) is a Cisco proprietary protocol extension which controls the flow of multicast streams to individual VLAN members. This solves the above problem. IGMP must also be running on the router for CGMP to work.
- kunaltyagi
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18 years 8 months ago #14102
by kunaltyagi
I'm an artist by living --- my art is my life
Replied by kunaltyagi on topic Re: CGMP vs IGMP
Ya even i have faced the same problem where IGMPv3 collides with the working of CGMP ...
I'm an artist by living --- my art is my life
18 years 8 months ago #14114
by havohej
HI qster, as kunaltyagi says, you cant run both igmv3 or cgmp, because both practically do the same stuff.
With igmpv3 and also igmp snooping enabled, there is no need for cgmp, mean that the switch is also inspecting the source multicast streams from host that join or leave the groups, and builds another table for multicast traffic. (the job cgmp in the past done between the router and the switch).
The advtanage, it takes less time for the switch to know when a multicast host joins or leave a group.
Replied by havohej on topic Re: IGMP v.3
I heard of an issue with CGMP not working properly with IGMPv3? Has anyone seen this problem?
HI qster, as kunaltyagi says, you cant run both igmv3 or cgmp, because both practically do the same stuff.
With igmpv3 and also igmp snooping enabled, there is no need for cgmp, mean that the switch is also inspecting the source multicast streams from host that join or leave the groups, and builds another table for multicast traffic. (the job cgmp in the past done between the router and the switch).
The advtanage, it takes less time for the switch to know when a multicast host joins or leave a group.
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