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Bem-vindo à Comunidade de Suporte da Cisco, gostaríamos de ter seus comentários.

Cisco C4948-10GE Console port problem

Hi all,

I recently upgraded my Cisco C4948-10GE switch's boot image from  "cat4500-ipbase-mz.122-53.SG2.bin" to "cat4500-ipbasek9-mz.150-2.SG8", and forced it to boot from the new one "boot config bootflash:cat4500-ipbasek9-mz.150-2.SG8", but the operation did not succeed, the switch crashed and lost all configuration.

I tried to configure it again but there's no display when connected to the console port, I used several clients (HyperTerminal, Putty, CRT) with different speeds (1200-2400-4800-9600-....-115200) but could not succeed. There's no response from the console port.

Now the switch look like starting up correctly and looks using the old image, I can see it in CDP Neghiborhood, but can't console it.

sh cdp neighbors g2/7 detail
Device ID: Switch
Entry address(es):
Platform: cisco WS-C4948-10GE,  Capabilities: Router Switch IGMP
Interface: GigabitEthernet2/7,  Port ID (outgoing port): GigabitEthernet1/48
Holdtime : 173 sec

Version :
Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500-IPBASE-M), Version 12.2(53)SG2, RELEASE SOFTWARE (fc1)
Technical Support:
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Tue 16-Mar-10 00:54 by prod_rel_team

advertisement version: 2
VTP Management Domain: ''
Native VLAN: 1
Duplex: full (Mismatch)
Management address(es):


  • Routing & Switching
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