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I have set up a SPAN session on a switch within a campus network:Session 1---------Type : Local SessionSource Ports : Both : Gi0/18Destination Ports : Gi0/23 Encapsulation : DOT1Q Ing...
We run a network of several 2960G and 3650G switches in a network with a number of VLANs. One one particular VLAN (let's call it VLAN 10) it appears that non-broadcast traffic (i.e. normal unicast traffic) is being copied to every port in VLAN 10 onl...
I was rather surprised today to discover that the latest IOS available for the 2960-C switches is 12.2 (55). Other similar switches, like the 2960S range are using IOS 12.2 (58) or 15.0.1-SE2. This doesn't sound like the end of the world at first, bu...
think that Aaron has made an important point here. If I understand his point it is that the VLAN can exist on the relevant switches by simply being configured on a port and a trunk. The VLAN does not need to exist on the MX. I had not grasped this be...
Thank you Giuseppe.In my case the SPAN destination port is correctly configured as a trunk port. What I find odd is that I would expect all traffic mirrored on VLAN 20 would be tagged or all to be untagged, not some kind of mixture. It seems strange ...
Have a look at the Catalyst 3750X-12S. This has 12 SFP ports and can take an optional module that accepts 2 x 10G ports. Two of these in a redundant pair is a cheaper alternative for you to consider.Daniel
Thank you for these very useful pointers. Unknown flooding would seem to be the issue.The flooding seems to be patternless, definitely not on a five minute cycle. I have attached a sample graph.The mac address table has 1008 entries out of 8K. 928 ar...
It seems that I got a bit carried away. 12.2 (55) does include VTP 3, and so there is no major compatibility problem.It still surprises me that this switch has such an old IOS release.Daniel
