Category Archive: Routing & Switching

Sep 06

Cisco StackWise – 3750 Stacking Issue

We found a really weird issue with a version of IOS on our Cisco 3750 stack. A stack of five 3750 switches was created and configured for one switch to be master of the stack and another stack member as secondary master. However, as soon as you reboot the stack, the switches come back online and …

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Feb 02

Cisco 3560 IOS Issue

The following IOS version has issue connecting Cisco 7940 phones on it ports. The switch ports were getting error disabled with warning message of 'loopback detected'. The initial thinking was that its being caused by some inline power misconfig but with nothing much to configure power related on switch, it was ruled out. A …

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May 12


Scope: As part of my project I need to test the best routing option to use such that WAN traffic leaves the network without much disruption. I will be using ASA firewall for inter VLAN routing and this firewall will send traffic to gateway routers for any access to the outside world. The router with …

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