Hi guys ,
Just decided to write a blog so that i can share my daily networking troubleshooting experiences and some new ideas! that i learn from the web.Hope you will like it.

Thanks

1) Today there was activity of Router Replacement
Everyone thinks that this is not a big deal , but as someone said

Experience counts

So Let me tell you what i faced :-
I went to Data Centre 1/2 hour before and mounted the router in rack, then thought that fastethernet cable was lying down crossing 1 rack why not fit the fastethernet cable to the patch panel which is situated in the rack itself……–the one who had done this might be idiot

i thought and then i began testing whether vlan are same , cable is proper…

Oh my god the downtime has started, so i just skipped it and started my activity

First, i shutdown the router then removed the cables and inserted card into new routers(1 Channelized E1/T1 Card, 1 Serial Card, 1 WIC2T card )

But hey which cable are inserted in which card ??

By god’s grace my memory was sharp and i wasted 5 min in remembering the cables and lastly inserted properly.

Now i started my new Router(2651XM) and everything was ok! Then 5 min remaining , i thought why not change the fastethernet cable as i thought earlier ..and i went to do the same.

I inserted cable into proper vlan and then my god what happened i wasn’t able to ping other network behind fastethernet 0/0 ….

Downtime finished and i realized the duplex !!!

I went quickly and typed the following command:

set port duplex 3/3 full
but nothing happened and the port was still in half duplex then i entered the following command and miracles happened..
set port speed 3/3 100

And i remembered in CAT OS set speed first and then duplex
So if you are going for router replacement just ensure that below things are in place:-

1) Configure your router properly beforehand
2) Label the cables on the existing router
3) Check whether the cables will reach to the location where router will be fitted
4) Mount the router in the rack

And ya one more just don’t forget that in CAT OS set speed first and then duplex

Filed under: General by amol0009in_7