[comp.dcom.sys.cisco] Problems using HELLO protocol and gated

jm@imsd.contel.com (Jim Macropol) (12/05/90)

I have a problem exchanging routing information between a VAX 11/750 running
GATED version 2.0.1.4 and a cisco.

This is our machine configuration:

          ------------                   ----------
          |   VAX    |                   | cisco  |
milnet----+          +--local ethernet---+        +----X.25 to other nets
26.0.0.0  |          |   192.26.147.0    |        |
          ------------                   ----------

The cisco exchanges routes with other ciscos via IGRP.
The VAX exchanges routes with the core using EGP (obviously).
Both the cisco and the VAX broadcast default routes over the ethernet
using RIP.

Our first inclination was to exchange routes using BGP.  However, the cisco
would not allow redistributing the BGP routes into IGRP.
So, we decided to exchange routes via HELLO.

Gated on the VAX sees the cisco's hello packets just fine, but the cisco
does not like gated's packets at all.  A "debug ip-hello" on the cisco
produces:
	HELLO: bad checksum from 192.73.3.1 
in response to gated's packet:
	Dec  4 10:47:18 HELLO SENT 192.73.3.1 -> 192.73.3.5  20 bytes  1 nets
	HELLO SENT unsync 12/4/90 18:47:20.232 GMT  tstp 0
	HELLO SENT      type 1  count 1
	HELLO SENT              26.0.0.0         delay     1  offset 0
The ethernet interface on the VAX is OK, so I do not (presently) suspect
hardware to be the culprit.

The following is the relavant portions of the gated.conf file:
	hello pointopoint {
		defaultmetric 5 ;
		interface 26.5.0.103 192.26.147.1 nohelloin nohelloout ;
		sourcegateways 192.73.3.5 ;
	} ;
	accept proto hello {
		listen 192.73.3.1 ;
	} ;
	propagate proto hello {
		proto egp as 164 {
			announce all ;
		} ;
		proto direct {
			announce 26.0.0.0 metric 1 ;
		} ;
	} ;

And from the cisco configuration:
	router hello
	distribute-list 3 out
	default-metric 200
	network 131.131.0.0
	network 192.26.147.0
	network 192.73.3.0
	redistribute igrp 131
	neighbor 192.73.3.1
	passive-interface Ethernet0
	passive-interface Serial0

Any suggestions/bugfixes are appreciated.
Thanks.
-----
James Macropol			jm@imsd.contel.com
Contel Federal Systems		wlbr!jm