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New Member


Does anyone know why i cannot see serial interfaces on a WIC 2T module inserted on a C2821 router.


Re: c2821 HARDWARE

Hi there,

If you do "show version", does the router list "2 Serial(sync/async) interfaces"?

Have you tried the WIC in another slot (or, if possible, another router)? If there is a hardware issue, it would be good to try this to rule out either the router or the WIC as being faulty.

Kind regards,


New Member

Re: c2821 HARDWARE

No it doesn't display the serial interfaces.

The module has been tested okay on another box (2621), but no slot in this particular box (2821) can see it. Other modules (like vwic 2mft-E1) is currently producing in the box. See output below.

Cisco 2821 (revision 53.50) with 247808K/14336K bytes of memory.

Processor board ID FTX1031A3RK

2 Gigabit Ethernet interfaces

36 Serial interfaces

8 Channelized E1/PRI ports

DRAM configuration is 64 bits wide with parity enabled.

239K bytes of non-volatile configuration memory.

62720K bytes of ATA CompactFlash (Read/Write)

Configuration register is 0x2102

Re: c2821 HARDWARE

WIC-2T is supported in Cisco 2821 Router with a minimum of 12.3(8)T4 IOS

What is your IOS version?

New Member

Re: c2821 HARDWARE

See below the output showing my version;Cisco IOS Software, 2800 Software (C2800NM-SPSERVICESK9-M), Version 12.4(3e), RE


Technical Support:

Copyright (c) 1986-2006 by Cisco Systems, Inc.

Compiled Tue 13-Jun-06 23:24 by alnguyen

ROM: System Bootstrap, Version 12.4(1r) [hqluong 1r], RELEASE SOFTWARE (fc1)

Hall of Fame Super Gold

Re: c2821 HARDWARE

Please send "show diag".

Re: c2821 HARDWARE

All C2821 4 on-board slot is for HWIC, so it shouldn't be a problem which slot you put the WIC-2T card. Its different for other model though.

Can you post the complete output of "show diagnostics"?

New Member

Re: c2821 HARDWARE

Also, you can observe the output from these commands:

- show inventory

- show diag



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