About Mohamed

Mohamed · 09-25-2016

Hi, I would like to have your suggestions concerning Cisco routers that support STM1 Cards. I am looking for a router reference (product or part number) that supports 2 STM1 cards maximum, at least 4 GigaBitEthernet Ports and must support security fe...

Mohamed · 02-08-2016

Hi everyone, a week ago a strange behavior happened on my network where an STP loop occured on two different spanning-tree vlan instances causing the isolation of 4 switchs at the same time (errdisable). Here's the log on PSW01, PSW02, BSW01, BSW02 (...

Mohamed · 02-11-2016

Hi Philip, yes indeed, stacking them together will solve many problems and will also increase the performances. I will think about this solution. Thank you for your help, I very much appreciate it.

Mohamed · 02-10-2016

HelloThe distribution switch isn't the root bridge, because most of the traffic goes between PSW01 and PSW02, we made PSW02 the root bridge so the traffic would flow throughout GigaEthernet ports instead of fastEthernet.

Mohamed · 02-09-2016

Hi mark, so from your response I understand that the distribution switch may not have received the superior BPDU from PSW02. And if that was the reason of the problem, why would PSW01 put its interface (Gi0/23) in errdisable mode since it's not the r...

Mohamed · 02-09-2016

Hi paul, thanks for replying, all unnecessary vlans are pruned and of course I will apply UDLD aggressive on all trunks to avoid any future problems, but i would like to find an explanation to the problem that occurred.

Mohamed · 02-09-2016

Hi Philip, thank you for replying, I am using a cisco catalyst 3560 (IOS C3560-IPSERVICESK9-M, Version 12.2(55)SE6), and the other four switchs are cisco C2960 (IOS C2960X-UNIVERSALK9-M, Version 15.0(2)EX3). The spanning-tree algorithm being used is ...

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Cisco Routers that support STM1 card: Suggestions

STP Loopback error and Keepalive : ETHCNTR-3-LOOP_BACK_DETECTED

Hi Philip,

HelloThe distribution switch

Hi mark, so from your

Hi paul, thanks for replying,

Hi Philip, thank you for