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I have recently come to find that my 6509 chassis' have reached the peak of capacity as far as power is concerned. Cisco has advised me to upgrade power supplies from 1300W to 2500W. Okay, so I run some 220 and I'm ready to go. Question here is how d...
I am trying to understand the signalling that a port goes through when a connection is made. The problem I am seeing is this:In an HA config server, I have two physical connections. One to access switch A, and one to access switch B. These remain ...
Does anyone have information regarding the differences between dot1q and ISL trunks? As I understand it, ISL encapsulates the packet with a 32-byte header. This can decrease the scalability of the network. The addition of say 10 vlans over a trunk...
What the commands are doing in this instance is:portfast: does not go through the spanning-tree algorhythm and comes up faster, almost instantly.bpduguard: says that if a bpdu (spanning-tree packet) is received on this port, shutdown the port. This m...
Cisco states that the max PPS for the platform is 15 Million. When they measure max PPS, the use 64 byte packets, because you can pass the most packets per second with the smallest packet sizes. there are 8bits in a byte. So, the equation 15 Mppsx...
Building on prkrishn's input, Cisco's signalling including Ethercahnnel, trunkin others isn't always reliable. It may be that you need to set your channels to on, on manually. It might also be that you simply need to enable the err-disable side. I...
