Hi Friends
          I have cisco 2510 router that hangs during
bootup process when it tries to intialize token ring
port. If I bypass the NVRAM, then it works fine. It
has IOS 11.2.
I tried to upgrade the IOS using serial ports but it
failed. It there any way, I can upgrade IOS.

 Thanks for any help.

 Arun

=====
Arun Upadhyay
SE Engineering
MCSE CCNA CNA

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