My Networking adventures
We recently got some Cisco NCS 540’s which we need to deploy. By default when they were shipped they didn’t have multicast activated or even have the RPM installed. For those familiar with the ASR platform, the NCS platform also uses the same IOS-XR software, but with version 6.0 they moved away from the PIE
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My current company has gone all in with Cisco on their IPFM (IP Fabric for Media) using a “Spine/Leaf” solution. I put Spine/Leaf in quotes because it definitely isn’t traditional. We have a chassis acting as the Spine with all of the Leafs attached. . . . which is pretty much just a standard deployment
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I just ran into an issue where I could see the multicast join was happening and the mroute seemed to be formed on my Nexus 7K, but we were receiving 0 bits of traffic. This was a turn up for a new system so we started troubleshooting everything and anything. Looking at the the show
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One of the biggest issues we ran into in 2017 was finding out that Multicast was buffered differently on the Cisco Nexus platform. This took a while to troubleshoot because you really have to know where to look to find a problem. When Cisco came out with the F3 cards we jumped all over those
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I just had an issue where I was attempting to do a packet capture on a 2K Fex that was attached to a Nexus 5K. Since you can’t use the Fex port as a destination I had the destination port on the 5K itself, while the source was on Fex 7. Once I started the
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Recently I had an issue where I would up troubleshooting multicast with a TON of CC errors. We were sending a 20 Mbps stream to a station, and they were only receiving 15 Mbps. They were also sending 20 Mbps to us and we were receiving 15 Mbps. It turns out the issue was circuit
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We had an ongoing issue recently with multicast receivers on our 4507 that would loose their multicast groups every so often and we couldn’t explain why. It looked like the problem was the 4507. We were able to do packet captures that proved that the 4507 was definitely receiving the igmp group requests from the
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I just had a good lesson last night with Cisco TAC in multicast Forwarding that took a few hours to figure out. The initial call I received was that multicast was going in and out on one of our networks. I logged in and took a look at something I rarely look at on this
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I’ve been thinking about doing a blog of my networking career for a bit after listening to the Packet Pushers podcast, and I’m finally doing it. I have seen a lot of things over the past 20+ years doing computer networking and I figure I might as well impart some knowledge to the community. It
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