09-09-2008 04:10 AM - edited 03-03-2019 11:27 PM
I have two Cisco 2821 that I tried to use for MCAST but once MCAST traffic is enabled, the CPU goes to 98% and the HSRP process starts to flip flop between both routers. Could the 2821 routers be used for MCAST?
09-09-2008 06:03 AM
on your interfaces do you have ip mroute-cache? if not try adding that - also make sure CEF is enabled.
09-09-2008 06:54 AM
yes, I do.
09-09-2008 07:51 AM
what is the bandwidth of the stream?
09-09-2008 09:58 AM
the problem seems to be with over subscriptions. We are dropping a significant number of packets once we turn on MCAST.
09-09-2008 11:58 AM
so all you are doing is configuring pim? No multicast flows? If you have a flow how much is the pps total? The reason i ask is i have destroyed a 7200-npe-g1 with a 1-10mb flow of multicast.
09-09-2008 07:01 PM
If I understand your question. Yes, I only have ip pim rp address and ip pim sparse-mode configured on the device.
Below is part of the sh int output after clearing the counters.
Last clearing of "show interface" counters 00:03:48
Input queue: 4/75/35053/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 3767000 bits/sec, 3667 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1300612 packets input, 172618718 bytes, 0 no buffer
Received 1300319 broadcasts, 0 runts, 0 giants, 7825 throttles
10-13-2008 08:38 AM
I resolved the problem. The routers' CPU were clearly not able to handle multicast so I redesign the network to use the 3750G switches.
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