Problem With E1

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?

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 you
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

Don't forget SNMP and NetFlow, both on the router, but also SNMP on the
access device, modem, multiplexer, etc.

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; perhaps
save the routing table when storing those displays.

Even more displays could be useful, such as subinterfaces.

Electrical tests, such as verifying the signal clocking and amplitude, are
usually last resorts -- although do verify that no one has moved the cabling
among router/CSU ports, and that everything has power.

Using an external CSU? Power cycle it.
Using Frame Relay? Have provider check card in Frame switch, if the port reads 65535 the buffers are full. Have the provider reset the card (shared memory cards are bad).

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 push in the right direction.

DR Graham

If the router is cisco , you also wanna check the code and see if there
are any known bugs on the code track. We had a simmiliar issu with an
IOS and BGP.

But , I do agree with Darel , as well.
  Mo Durrani

TDS Telecom
IP Network Engineering

Hi Mathew

Thanks for the reply. Problem solved morning after resetting the port from
Service Provider End. As per SP RCA, mux por was hanged but really we are
not conveinced.

shivlu jain