| Author |
Bizarre interface prob...
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| Jonathan 2004-03-17, 11:25 pm |
| This is something I have never seen before:
Serial1 is up, line protocol is down (looped)
I assure you, no where on this PVC is anything looped (i.e. 'loopback' in
the interface config)
Any ideas?
Jonathan
| |
| John Agosta 2004-03-18, 11:24 am |
|
"Jonathan" <jrcdehc@nospam.hotmail.com> wrote in message
news:Hr86c.10890289$Id.1826836@news.easynews.com...
> This is something I have never seen before:
>
> Serial1 is up, line protocol is down (looped)
>
> I assure you, no where on this PVC is anything looped (i.e. 'loopback' in
> the interface config)
>
> Any ideas?
>
>
>
>
> Jonathan
Sounds like the remote end of your frame port (what you think is a switch)
is actually set up as a DTE and polling your router.
You can verify this by debugging frame-relay lmi
If you see incoming "enexpected status enq"
this is the case.
Is this a real frame hookup or a lab scenario ?
If it's a practice lab, make sure one router has the serial port set up
with:
enc frame
frame-relay intf-type dce
then enter :
no loop
If this is a real frame hookup, then the carrier needs to check the switch
settings, they should be Responding_to_your_polls, not Polling_you.
-ja
| |
| Jonathan 2004-03-19, 1:24 am |
|
"John Agosta" <j_agosta@remove_wideopenwest.kom> wrote in message
news:GY6dnfzPKt9pXMTd4p2dnA@wi
deopenwest.com...
>
> "Jonathan" <jrcdehc@nospam.hotmail.com> wrote in message
> news:Hr86c.10890289$Id.1826836@news.easynews.com...
in[color=blue]
>
> Sounds like the remote end of your frame port (what you think is a switch)
> is actually set up as a DTE and polling your router.
>
Nope, its set up as DCE with clock rate... and they are both set to the same
LMI type (cisco)
> You can verify this by debugging frame-relay lmi
>
> If you see incoming "enexpected status enq"
> this is the case.
>
Yep, that's what I am getting... the question is why...
> Is this a real frame hookup or a lab scenario ?
Lab
> If it's a practice lab, make sure one router has the serial port set up
> with:
> enc frame
> frame-relay intf-type dce
>
> then enter :
> no loop
>
Already tried that.
This is annoying as hell... I think my frame switch is toast... (its a 2521)
Jonathan
| |
| John Agosta 2004-03-19, 1:24 am |
|
"Jonathan" <jrcdehc@nospam.hotmail.com> wrote in message
news:9dv6c.128667$iA2.17620@news.easynews.com...
>
> "John Agosta" <j_agosta@remove_wideopenwest.kom> wrote in message
> news:GY6dnfzPKt9pXMTd4p2dnA@wi
deopenwest.com...
> in
switch)[color=blue]
>
> Nope, its set up as DCE with clock rate... and they are both set to the
same
> LMI type (cisco)
>
>
> Yep, that's what I am getting... the question is why...
>
>
> Lab
>
>
> Already tried that.
>
> This is annoying as hell... I think my frame switch is toast... (its a
2521)
>
>
>
>
> Jonathan
I dont think anything is "toast."
You have a config problem.
Post both routers' configs.
There's lottsa folks here that will spot the error...'
| |
| Hansang Bae 2004-03-19, 1:24 am |
| In article <9dv6c.128667$iA2.17620@news.easynews.com>,
jrcdehc@nospam.hotmail.com says...
[snip]
> This is annoying as hell... I think my frame switch is toast... (its a 2521)
Hey Jonathan... Just turn it into P2P to see if the interfaces are OK.
At least start to rule it out.
--
hsb
"Somehow I imagined this experience would be more rewarding" Calvin
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Due to the volume of email that I receive, I may not not be able to
reply to emails sent to my account. Please post a followup instead.
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| |
| dstvns 2004-03-19, 12:29 pm |
| On Thu, 18 Mar 2004 03:11:35 GMT, "Jonathan"
<jrcdehc@nospam.hotmail.com> wrote:
>This is something I have never seen before:
>
>Serial1 is up, line protocol is down (looped)
>
>I assure you, no where on this PVC is anything looped (i.e. 'loopback' in
>the interface config)
>
>Any ideas?
Mine did this for a while, and nothing software-wise would fix it.
The I pulled the plug and noticed two of the metal hair-pins on the
serial cable were sharing the same plug. I straightened them out and
then it worked fine.
Dan
| |
| Jonathan 2004-03-19, 1:26 pm |
|
"Hansang Bae" <uonr@alp.ee.pbz> wrote in message
news:MPG.1ac454a4278785c9989c5d@news-server.nyc.rr.com...
> In article <9dv6c.128667$iA2.17620@news.easynews.com>,
> jrcdehc@nospam.hotmail.com says...
> [snip]
2521)[color=blue]
>
> Hey Jonathan... Just turn it into P2P to see if the interfaces are OK.
> At least start to rule it out.
>
Yeah, in HDLC, it works fine...
Here are the configs...
On the frame switch:
frame-relay switching
!
interface Serial0
no ip address
encapsulation frame-relay
no fair-queue
clockrate 2000000
frame-relay lmi-type cisco
frame-relay intf-type dce
frame-relay route 521 interface Serial2 251
frame-relay route 531 interface Serial1 351
frame-relay route 540 interface Serial3 450
!
interface Serial1
no ip address
encapsulation frame-relay
no fair-queue
clockrate 2000000
frame-relay lmi-type cisco
frame-relay intf-type dce
frame-relay route 351 interface Serial0 531
On the router:
!
interface Serial1
ip address 133.2.123.3 255.255.255.0
encapsulation frame-relay
no fair-queue
frame-relay map ip 133.2.123.1 351 broadcast
frame-relay map ip 133.2.123.2 351 broadcast
frame-relay map ip 133.2.123.3 351 broadcast
frame-relay interface-dlci 351
no frame-relay inverse-arp
frame-relay lmi-type cisco
Jonathan
> --
>
> hsb
>
> "Somehow I imagined this experience would be more rewarding" Calvin
> *************** USE ROT13 TO SEE MY EMAIL ADDRESS ****************
> ******************************
******************************
********
> Due to the volume of email that I receive, I may not not be able to
> reply to emails sent to my account. Please post a followup instead.
> ******************************
******************************
********
| |
| Jonathan 2004-03-19, 2:29 pm |
|
"dstvns" <weoruu@ptd.net> wrote in message
news:vi8m50lbngunj315mb83c1bi6
e03djpmvp@4ax.com...
> On Thu, 18 Mar 2004 03:11:35 GMT, "Jonathan"
> <jrcdehc@nospam.hotmail.com> wrote:
>
>
> Mine did this for a while, and nothing software-wise would fix it.
> The I pulled the plug and noticed two of the metal hair-pins on the
> serial cable were sharing the same plug. I straightened them out and
> then it worked fine.
>
Wow... that was it...
Good call!
Jonathan
| |
| dstvns 2004-03-19, 9:25 pm |
| On Fri, 19 Mar 2004 18:08:11 GMT, "Jonathan"
<jrcdehc@nospam.hotmail.com> wrote:
>
>Wow... that was it...
>
>Good call!
Nice...now I only wish someone with a networking budget would hire me
and get this wonderful knowledge while helping me pay the bills 
Only 17 months until the CCNA expires, and I can't afford $5,000 in
CCNP eqipment. Most local job posts require CCNP as a minimum.
My motto - "8 out of 10 problems are a bad connection somewhere along
the line."
Dan
| |
| tiger1lcw 2004-05-15, 5:03 pm |
| I have the same problem- the line protocol on serial 1 is flapping up and down every 10 seconds. I'm using HDLC, a DCE/DTE crossover cable in a lab environment. It's not the cable - swapped it and it works good other places, and a good one doesn't work here. IT is happening on the serial 1 port of two 2503's I just on ebay as part of a 5 router lab. Any ideas?
Thanks,
Leslie | |
| Mat P 2004-05-27, 12:09 am |
| I had a similar problem, not sure if it applies here. I had an interface bouncing regular because the interface couldn't support the clock rate - look for "underruns" in the show int. I reduced the clock rate to 125000 and it fixed it. |
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