Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!VENERA.ISI.EDU!prue
From: prue@VENERA.ISI.EDU
Newsgroups: comp.protocols.tcp-ip
Subject: Re:  milnet/nsfnet(cerfnet) connectivity
Message-ID: <9002051830.AA02579@fji.isi.edu>
Date: 5 Feb 90 18:30:06 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 34

>We recently needed to connect from a milnet site (nprdc.navy.mil)
>to a cerfnet site (sdsu.edu) , and found delays were about ~30secs.
>This is particularly annoying given that the sites are less than
>5 miles apart.  The milnet/arpanet core gateways were redirecting
>nprdc.navy.mil through reston-dcec-mb.ddn.mil; ie, both sites are
>in San Diego CA, but at least one site was being redirected through
>VA(?).

>Admittedly the milnet is only 56kb and is now an unfashionable
>backwater of the networking galaxy, but something seems very
>wrong with the routing to produce delays of 1/2 minute.

I coordinate the routing within Los Nettos in the Los Angeles Area.  Los Nettos
and CERFnet have well coordinated routing and are well interconnected.  They
can be thought, topologically, to be the same regional network.  They are not
administratively the same but again are well coordinated.  Los Nettos advertises
sdsu.edu to the Arpanet and in particular to the mail bridge 

	MARINA-DEL-REY-MB.DDN.MIL  ==>  26.6.0.103  10.6.0.22
	
This mail bridge is co-located with a Los Nettos node and on the same PSN, #22,
on the Arpanet.

Within Los Nettos/CERFnet the route back is via full T1 to this mail bridge.
That is, the return path does not touch the NSFNET backbone.  I have no tools 
to tell me the path from your node towards sdsu.edu.  Right now the ping times
from the Los Nettos node co-located with the mail bridge, to sdsu.edu is 
averaging 182 ms.

I do know that MARINA-DEL-REY-MB.DDN.MIL has been unresponsive to pings at 
various times and may or may not have forwarded packets.

Walt Prue
213-822-1511