I'm looking to get multicasting working between real servers that are behind the CSM.
I'll attached the router config as an example of how the CSM is configured. Note, that we have static routes in place to direct traffic to the real servers from the router to the CSM.
Through a lot of testing, i've found some interesting results, and and i'll explain them as 2 senarios:
Senario 1: no SVI created on the router
In this setup, i have been able to get multicasting working between the real servers on vlan (386) only when i use certain multicast addresses. For example 188.8.131.52 or 184.108.40.206 or alike. If i use 220.127.116.11 or alike, multicasting between the real servers don't work!
How are these IP addressses treated differently? Why do some addresses work, and others don't?
Senario 2: create an SVI vlan 386 on the router
In this setup, creating a SVI with an IP Address and ip pim sparse mode enabled, results in multicasting working for any multicast address. As such load balancing to the real servers continue to work. However, i've noticed that from some subnets traffic to the real servers doesn't get through e.g. SSH etc. Investigations found that the IP address configured on the SVI was presenting a different route!
- What could be a possible fix?
Note, going with senario 2, i was looking to put in place a policy map that routes any traffic coming into interface 386 to a next hop IP of 18.104.22.168, which is the same next hop IP as defined by the static routes.
Would be very useful if you could shed some light on this issue!
22.214.171.124 - 126.96.36.199 ------------->GLOP addresses used as multicast addresses between two different AS.
I think in your scenario, 239.0. network because there is an edge router between your 2 servers and one server should be a registered ip address.This may also be a reason but still there can be more than 1 reason.
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