RE: loopback the WIC card, how is it done?
Hey Listers. I was thinking about this cool thing one of the cisco TAC engineers did when helping me troubleshoot a tricky network problem a few months ago. They looped up my serial interface on a 2600 to verify the WIC card was working properly, and that the attached CSU was not faulty. They configured the WIC interface to show up and up , even though there T1 was down. The problem is , I can not remember the command sets that were run to make this work. ! Anyone know this one? ugh. jason -Original Message- From: Tony van Ree To: David A. Lauer; [EMAIL PROTECTED] Sent: 3/19/2001 4:17 PM Subject: RE: loopback test Hi, If you want to check your protocol stack you should be able to ping yourself, check you ip interfaces and/or check your route table (assuming IP is used). There are a number of utilities that check network cards. Teunis Hobart, Tasmania Australia On Monday, March 19, 2001 at 07:56:26 AM, David A. Lauer wrote: Why would you need to? Do you have a link light at the interface port and the hub/switch? Does the interface show Interface UP line Protocol up? Cat 5 ethernet uses the 568B pinout for the RJ45 connectors. You could create loopback plug by cross-connecting pins 1-3 and 2-6. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of zd z Sent: Monday, March 19, 2001 4:26 AM To: [EMAIL PROTECTED] Subject: loopback test Is there any one knows how to do the loopback test on ethernet or fastethernet port ? __ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] -- www.tasmail.com _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: loopback the WIC card, how is it done?
The best way to do this is build yourself a T1 or 56 cross-over plug and set the clocking to internal. You can use loopback commands to do it as well but I prefer external plug which is a more complete test IMHO (traffic leaves the interface and comes back). Set encaps to HDLC. --- "Bullock, Jason (1125)" [EMAIL PROTECTED] wrote: Hey Listers. I was thinking about this cool thing one of the cisco TAC engineers did when helping me troubleshoot a tricky network problem a few months ago. They looped up my serial interface on a 2600 to verify the WIC card was working properly, and that the attached CSU was not faulty. They configured the WIC interface to show up and up , even though there T1 was down. The problem is , I can not remember the command sets that were run to make this work. ! Anyone know this one? ugh. jason -Original Message- From: Tony van Ree To: David A. Lauer; [EMAIL PROTECTED] Sent: 3/19/2001 4:17 PM Subject: RE: loopback test Hi, If you want to check your protocol stack you should be able to ping yourself, check you ip interfaces and/or check your route table (assuming IP is used). There are a number of utilities that check network cards. Teunis Hobart, Tasmania Australia On Monday, March 19, 2001 at 07:56:26 AM, David A. Lauer wrote: Why would you need to? Do you have a link light at the interface port and the hub/switch? Does the interface show Interface UP line Protocol up? Cat 5 ethernet uses the 568B pinout for the RJ45 connectors. You could create loopback plug by cross-connecting pins 1-3 and 2-6. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of zd z Sent: Monday, March 19, 2001 4:26 AM To: [EMAIL PROTECTED] Subject: loopback test Is there any one knows how to do the loopback test on ethernet or fastethernet port ? __ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: loopback the WIC card, how is it done?
"Bullock, Jason (1125)" wrote: Hey Listers. I was thinking about this cool thing one of the cisco TAC engineers did when helping me troubleshoot a tricky network problem a few months ago. They looped up my serial interface on a 2600 to verify the WIC card was working properly, and that the attached CSU was not faulty. They configured the WIC interface to show up and up , even though there T1 was down. The problem is , I can not remember the command sets that were run to make this work. ! Anyone know this one? ugh. S/he probably had you do: interace s0 loopback which commands the serial NIC to assert the signal lead to the DCE called loopback. If the DCE (CSU/DSU or whatever) is optioned to obey this, then it will perform a local loopback. So whatever the router sends is reflected back to it on the receive side. Note this is totally different from the default HDLC keepalive message that is exchanged between the two routers. Marty Adkins Email: [EMAIL PROTECTED] Mentor Technologies Phone: 240-568-6526 133 National Business Pkwy WWW: http://www.mentortech.com Annapolis Junction, MD 20701Cisco CCIE #1289 _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: loopback the WIC card, how is it done?
It's a configuration command under the T1 controller.
i.e.;
config t
controller t1 slot/port
loopback {diagnostic |local {payload | line}|remote {iboc |esf {payload |
line}}
DaL
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Bullock, Jason (1125)
Sent: Monday, March 19, 2001 6:05 PM
To: '[EMAIL PROTECTED] '
Subject: RE: loopback the WIC card, how is it done?
Hey Listers.
I was thinking about this cool thing one of the cisco TAC engineers did when
helping me troubleshoot a tricky network problem a few months ago. They
looped up my serial interface on a 2600 to verify the WIC card was working
properly, and that the attached CSU was not faulty. They configured the WIC
interface to show up and up , even though there T1 was down.
The problem is , I can not remember the command sets that were run to make
this work. ! Anyone know this one? ugh.
jason
-Original Message-
From: Tony van Ree
To: David A. Lauer; [EMAIL PROTECTED]
Sent: 3/19/2001 4:17 PM
Subject: RE: loopback test
Hi,
If you want to check your protocol stack you should be able to ping
yourself, check you ip interfaces and/or check your route table
(assuming IP is used). There are a number of utilities that check
network cards.
Teunis
Hobart, Tasmania
Australia
On Monday, March 19, 2001 at 07:56:26 AM, David A. Lauer wrote:
Why would you need to? Do you have a link light at the interface port
and
the hub/switch? Does the interface show Interface UP line Protocol
up?
Cat 5 ethernet uses the 568B pinout for the RJ45 connectors. You
could
create loopback plug by cross-connecting pins 1-3 and 2-6.
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
zd z
Sent: Monday, March 19, 2001 4:26 AM
To: [EMAIL PROTECTED]
Subject: loopback test
Is there any one knows how to do the
loopback test on ethernet or fastethernet port ?
__
Do You Yahoo!?
Get email at your own domain with Yahoo! Mail.
http://personal.mail.yahoo.com/
_
FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
_
FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
--
www.tasmail.com
_
FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
_
FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
_
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: loopback the WIC card, how is it done?
Could this be an issue where the TAC guys may have zero-ed out the keepalives, so the interface would not know to go down... I guess that would only work with Frame or against ATM ILMI (if I'm on the right track)... Somebody throw me a rope, I'm sinking here :o) Phil - Original Message - From: "Bullock, Jason (1125)" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Monday, March 19, 2001 9:05 PM Subject: RE: loopback the WIC card, how is it done? Hey Listers. I was thinking about this cool thing one of the cisco TAC engineers did when helping me troubleshoot a tricky network problem a few months ago. They looped up my serial interface on a 2600 to verify the WIC card was working properly, and that the attached CSU was not faulty. They configured the WIC interface to show up and up , even though there T1 was down. The problem is , I can not remember the command sets that were run to make this work. ! Anyone know this one? ugh. jason -Original Message- From: Tony van Ree To: David A. Lauer; [EMAIL PROTECTED] Sent: 3/19/2001 4:17 PM Subject: RE: loopback test Hi, If you want to check your protocol stack you should be able to ping yourself, check you ip interfaces and/or check your route table (assuming IP is used). There are a number of utilities that check network cards. Teunis Hobart, Tasmania Australia On Monday, March 19, 2001 at 07:56:26 AM, David A. Lauer wrote: Why would you need to? Do you have a link light at the interface port and the hub/switch? Does the interface show Interface UP line Protocol up? Cat 5 ethernet uses the 568B pinout for the RJ45 connectors. You could create loopback plug by cross-connecting pins 1-3 and 2-6. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of zd z Sent: Monday, March 19, 2001 4:26 AM To: [EMAIL PROTECTED] Subject: loopback test Is there any one knows how to do the loopback test on ethernet or fastethernet port ? __ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] -- www.tasmail.com _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
