Console not working on Cisco 4506 SUP-II

ajaybatra · ‎06-30-2005

I have a Cisco 4506 with SUP-II. This is a standby switch and someone was previously using the same for testing. Now when I am trying to connect to the console its not showing anything. I have tried changing the speed to various settings from 9600 to 115200 but of no use. Also I have checked my console cable and port its being connected to (Both are workign for other switch). Also the utilisation shown on the Switch is 100%. I doubt there is some problem with the SUP. Please suggest.

thisisshanky · ‎06-30-2005

when u try these speeds, do u get any junk characters on the screen ? have you tried speeds lower than 9600 ? are there users on the switch ? when you say standby switch, was it running HSRP ? or was it just a cold standby.

Sankar Nair
UC Solutions Architect
Pacific Northwest | CDW
CCIE Collaboration #17135 Emeritus

ajaybatra · ‎07-02-2005

I tried all speeds but no junk characters. Triwed speed below 9600 also. No users on Switcha and it was in cold standby and not HSRP.

nkumar2005 · ‎06-30-2005

hi kumar here

1: is your switch having two sup engine, then the console on the active sup will only work.

2: if your switch is showing 100 % util then there is a problem and this can be the reason why the console is not responding,

3 to solve this and check if you sup-11 console is fine you can disconnect all the lan cables from the switch as this will not be of any use as the proc of the switch is 100%,

4: now after all the cables are disconnected the proc will come down and you can check the console

how the above steps solves your problem

ajaybatra · ‎07-02-2005

1. No only one SUP engine.. otherwise my switch would have been accessible.

2. yes switch show 100% util and before that it does not respond in the console too. Seems to be a problem with SUP.

3. I have removed all other modules from the SUP and still does not respond.

4. It is a boot up procedure when the utilisation goes to 100% and then comes down when it boots up..

Thanks for the help though..

Prashanth Krishnappa · ‎07-01-2005

Power cycle the switch with a PC connected to the console port. See if you see the boot up sequence in your hyperterminal.

ajaybatra · ‎07-02-2005

Didnt get anything on console after that too. Had checked all these steps already.. Thanks. The SUP has gone bad. I tried a new SUP-II made available by my Service Provider and everythign seems to be working..