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RE: [nv-l] Reason for " PPP LCP Closed" trap from Cisco routers

To: "anand anupam" <ananda@bharatpetroleum.com>
Subject: RE: [nv-l] Reason for " PPP LCP Closed" trap from Cisco routers
From: "Barr, Scott" <Scott_Barr@csgsystems.com>
Date: Mon, 4 Aug 2003 07:48:50 -0500
Cc: <nv-l@lists.tivoli.com>, <Hennis_Alan_E@cat.com>
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Thread-topic: [nv-l] Reason for " PPP LCP Closed" trap from Cisco routers
My experience with PPP is for Cisco acess servers and those typically have just plain old end-users telnet'ing in. Your application may mean that the connection is more imporant. In our environment, the error message WAS trivial. But in your environment maybe not. I am speculating, but I am guessing the 5 minutes is a timeout thing when the there is no traffic the router closes it. Probably need more of an expert on this than me.
-----Original Message-----
From: anand anupam [mailto:ananda@bharatpetroleum.com]
Sent: Monday, August 04, 2003 12:49 AM
To: Barr, Scott
Cc: nv-l@lists.tivoli.com; Hennis_Alan_E@cat.com
Subject: RE: [nv-l] Reason for " PPP LCP Closed" trap from Cisco routers

Hello Scott,
Thanks for responding to this query.
Your and Alan suggesting is well received. My only concern is that when we disable that particular interface, I will stop receiving all traps from that particular interface. But, with the kind of integration we have done, we require some kind of traps from every interface..... like, configuration change, coldstart, interface done for a longer period. Then, based on some rules, we are taking necessary actions on these traps.
Are you are suggesting that under  "PPP configured environment" error massage like " PPP LCP Closed" are common and we should not worry and also this does not necessary mean that the link is unstable.
But, sometimes, "PPP LCP open" massage comes after quite some time, say after 5 minutes and we believe that the said link was closed/down for 5 minutes. This downtime is not a desirable thing in our environment as this link is between primary and DR sites.
If "PPP LCP closed" is continued for say 5 minutes, what does this mean?
Here is the brief of the multilink that we have configured on this interface using PPP :-

" Right now we have 5 links working between location A and location B & 5 more in pipeline. These are configured using PPP multilink. In above configuration, virtual multi interface is created having all ip details. Serial interfaces do not have any ip address but since multilink and serial are made a part of one group & multilink virtual interface & PPP link  control protocol takes care of load balancing the traffic across include serial interfaces."

 -----Original Message-----
From: Barr, Scott [mailto:Scott_Barr@csgsystems.com]
Sent: Friday, August 01, 2003 6:27 PM
To: anand anupam; Hennis_Alan_E@cat.com
Cc: nv-l@lists.tivoli.com
Subject: RE: [nv-l] Reason for " PPP LCP Closed" trap from Cisco routers

The no snmp link status command is placed on a single interface - the lnik up/down traps for ONLY that interface are disabled. So the router will continue to send all traps - except for the interfaces you've turned off. This is HIGHLY desirable on PPP servers, VPN concentrators, dial up boxes, ISDN etc where the link goes up and down as part of it's normal operations.
-----Original Message-----
From: anand anupam [mailto:ananda@bharatpetroleum.com]
Sent: Friday, August 01, 2003 12:41 AM
To: Hennis_Alan_E@cat.com
Cc: nv-l@lists.tivoli.com
Subject: RE: [nv-l] Reason for " PPP LCP Closed" trap from Cisco routers

Hello Alan,

We have purposefully configured these routers to send snmp traps (up/down/coldstart/conf change etc.) to our NetView server and these traps are processed for some actions. So, stopping these routers to send snmp traps will affect our monitoring objectives.

I wanted to know, what could be the reason for " PPP LCP Closed" error message. Are our routers configured wrongly OR these errors shows that links are unstable.

This link is of multilink concept and 5 links of 2 mbps pipe is grouped together to give 10mbps output. Obviously, all these five links are configured on the same interface of the router and these links does not have different IP address.


-----Original Message-----
From: Alan E. Hennis [mailto:Hennis_Alan_E@cat.com]
Sent: Friday, August 01, 2003 1:48 AM
To: anand anupam
Cc: nv-l@lists.tivoli.com
Subject: Re: [nv-l] Reason for " PPP LCP Closed" trap from Cisco routers


You most likely have the following configuration on your router

! Host to send traps to
snmp-server host your_trap_processing_host

! Send SNMP traps, notice linkdown and linkup
! This can sometimes depending on the IOS version look like this
! snmp-server enable traps snmp
snmp-server enable traps snmp authentication linkdown linkup coldstart

 The solution is to

1. Disable sending SNMP traps. This will stop all authentication, linkdown,
linkup, coldstart and  warmstart traps

      no snmp-server enable traps snmp

2. Disable a particular interface from sending traps

      interface replace_with_your_interface
       no snmp trap link-status

Alan E. Hennis
Caterpillar Inc.
Systems+Process Division


                      anand anupam                                                                                                    




                      07/28/2003 12:06  To: nv-l@lists.tivoli.com                                                                     

                      AM                cc:                                                                                           




                                          Subject:      [nv-l] Reason for " PPP LCP Closed" trap from Cisco routers                   


Caterpillar: Confidential Green                 Retain Until: 08/30/2003
                                                Retention Category:  G90 -


We are having NetView 6.0.2 on AIX 4.3.3

From one cisco router, we are continuously receiving the following kind of
traps saying 'PPP LCP closed" :-

1059222261 11 Sat Jul 26 18:54:21 2003 CORT3  A Cisco Agent Interface Down
(linkDown Trap) on interface: Serial3/1:0 locIfReason: PPP LCP Closed

1059222279 11 Sat Jul 26 18:54:39 2003 CORT3  A Cisco Agent Interface Up
(linkUp Trap) on interface: Serial3/2:0 locIfReason: PPP LCP Open

What could be the problem with the router or its configuration? Where
should I look into?

Anupam Kr Anand


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