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Community Member

Cisco 7505

I have a 7505 Router with a ds3 card and a fast ethernet controller.

It gets crc errors over the ds3 line, to the point the ds3 is unusable, and while I am persuing that with the line provider I am having other problems.

I have two IP's on the fast ethernet controller, and after perhaps 9 or 10 hours of uptime, they eventually stop responding to pings (gives like a 95% loss and when it does respond its like over a second ping time, and im in the next room on 100 mbps) and doesn't listen to telnet. I power cycle the router and it works work for another 9 or ten hours.

This is what my sh ver yields. Anyone have suggestions? Do the crc errors and the ethernet errors seem connected?

I have enclosed info for review, let me know if you need anything else.

Router#sh ver

Cisco Internetwork Operating System Software

IOS (tm) RSP Software (RSP-K4PV-M), Version 12.0(14)S7, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)

TAC Support:

Copyright (c) 1986-2002 by cisco Systems, Inc.

Compiled Mon 04-Feb-02 18:35 by nmasa

Image text-base: 0x60010950, data-base: 0x60EA0000

ROM: System Bootstrap, Version 11.1(8)CA1, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)


Router uptime is 15 minutes

System returned to ROM by reload at 08:20:05 UTC Sun Mar 24 2002

System image file is "slot0:rsp-k4pv-mz.120-14.S7.bin"

cisco RSP4 (R5000) processor with 262144K/2072K bytes of memory.

R5000 CPU at 200Mhz, Implementation 35, Rev 2.1, 512KB L2 Cache

Last reset from power-on

G.703/E1 software, Version 1.0.

G.703/JT2 software, Version 1.0.

X.25 software, Version 3.0.0.

Chassis Interface.

1 VIP2 R5K controller (1 FastEthernet)(1 Serial).

1 FastEthernet/IEEE 802.3 interface(s)

1 Serial network interface(s)

123K bytes of non-volatile configuration memory.

20480K bytes of Flash PCMCIA card at slot 0 (Sector size 128K).

8192K bytes of Flash internal SIMM (Sector size 256K).

Configuration register is 0x102

Here is a show serial:

Router#sh int serial 3/1/0

Serial3/1/0 is up, line protocol is up

Hardware is cyBus PODS3 Serial

MTU 4470 bytes, BW 6000 Kbit, DLY 200 usec, rely 255/255, load 1/255

Encapsulation FRAME-RELAY IETF, crc 16, loopback not set

Keepalive set (10 sec)

LMI enq sent 182, LMI stat recvd 183,LMI upd recvd 0, DTE LMI up

LMI enq recvd 0, LMI stat sent 0,LMI upd sent 0

LMI DLCI 1023 LMI type is CISCO frame relay DTE

Broadcast queue 0/256, broadcasts sent/dropped 34/0, interface broadcasts 2

Last input 00:00:01, output 00:00:02, output hang never

Last clearing of "show interface" counters never

Queueing strategy: fifo

Output queue 0/40, 0 drops; input queue 0/75, 0 drops

5 minute input rate 4000 bits/sec, 13 packets/sec

5 minute output rate 4000 bits/sec, 12 packets/sec

71481 packets input, 3773865 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

0 parity

1161 input errors, 1058 CRC, 0 frame, 2 overrun, 0 ignored, 101 abort

69373 packets output, 3656831 bytes, 0 underruns

0 output errors, 0 applique, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

5 carrier transitions

LC=up CA=down TM=down LB=down TA=down LA=down

and here is sh int on the serial sub interface

Router#sh int serial 3/1/0.1

Serial3/1/0.1 is up, line protocol is up

Hardware is cyBus PODS3 Serial

Internet address is xxxxx (removed for anonymity)

MTU 4470 bytes, BW 6000 Kbit, DLY 200 usec, rely 255/255, load 1/255

Encapsulation FRAME-RELAY IETF

Please let me know what you think, my email is

Community Member

Re: Cisco 7505

Hi Daniel,

Good day! :-)

As of now I don't have a definite answer on your queries but I hope we can identify what the problem is if you could provide me the answer to the following questions. :-)

Can you please also post the 'show diag' of your 7500 router I just want to know what card are using.

Any changes before the problem occurred? Like hardware or software upgrade?

Were you able to check if you do have a very high CPU utilization on your 7500 router?

Have you performed a loopback test to isolate if the card is reliable.

Best Regards,

Ansley R. Verzosa

Community Member

Re: Cisco 7505

This is a new turn up circuit. We have spent a lot of time on the phone with the carrier and they assure us the line is clean.

I have attached a show diagbus.

I looped back the coax cable on the back of the router but the loopback command on this router doesn't look the same as the O'Reilly book described so I was unable to perform the loop back testing.

I tried various ways of testing it looped back and never seemed to get any good results, how would reccomend I do that?

The cpu utilization typically seems to be about 0% according to show processes

Thanks for the help, need anything else just ask.

Community Member

Re: Cisco 7505

On a side note when the line is plugged in like it should we get packet loss when pinging the local ip or the one on the remote end of the connection.

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