[112433] in North American Network Operators' Group
RE: Problem With E1
daemon@ATHENA.MIT.EDU (Graham, Darel)
Thu Feb 26 07:51:12 2009
From: "Graham, Darel" <Darel.Graham@Globalcrossing.com>
To: "nanog@nanog.org" <nanog@nanog.org>
Date: Thu, 26 Feb 2009 07:50:39 -0500
In-Reply-To: <00b001c9980e$daaceda0$020fa8c0@HDESK1>
Errors-To: nanog-bounces@nanog.org
Using an external CSU? Power cycle it.=20
Using Frame Relay? Have provider check card in Frame switch, if the port re=
ads 65535 the buffers are full. Have the provider reset the card (shared me=
mory cards are bad).=20
Without configuration info or other supporting info it will be difficult to=
tell what the underlying issues are with OSPF/Ckt. Thanks Howard for the p=
ush in the right direction.
DR Graham
-----Original Message-----
From: Howard C. Berkowitz [mailto:hcb@netcases.net]=20
Sent: Thursday, February 26, 2009 7:37 AM
To: nanog@nanog.org
Subject: RE: Problem With E1
> -----Original Message-----
> From: Shivlu Jain [mailto:shivlu.jain@gmail.com]
> Sent: Thursday, February 26, 2009 4:05 AM
> To: nanog@nanog.org
> Subject: Problem With E1
>=20
> Since morning I am facing a issue in which one of E1 is configured under
> OSPF. OSPF neighborship is up but not able to send and receive the data.
> The
> configuration is plain vanila. Why it is happening so; I donot know?
>=20
> --
> Thanks & Regards
> shivlu jain
> http://shivlu.blogspot.com/
> 09312010137
If this is an operational circuit, this is a good example of why it can
extremely useful to document the working configuration of a resource, so yo=
u
can compare the malfunctioning configuration. The document may well be
stored as a file, and the comparison could be made with diff or a similar
utility.
Don't forget SNMP and NetFlow, both on the router, but also SNMP on the
access device, modem, multiplexer, etc.=20
When that circuit first came up, I probably would have captured the
information from the router's equivalent of the Cisco commands:
* show interface
* show ip interface
* show ip ospf interface
* show ip ospf neigbors
Possibly show ip ospf database and show ip ospf database neighbors; perhap=
s
save the routing table when storing those displays.
Even more displays could be useful, such as subinterfaces.=20
Electrical tests, such as verifying the signal clocking and amplitude, are
usually last resorts -- although do verify that no one has moved the cablin=
g
among router/CSU ports, and that everything has power.
