Not a good day for EGP


Mills@UDEL.EDU
Sun, 17 Jan 88 13:17:39 EST


Folks,

I am used to seeing some amount of trash in the core gateway routing tables,
but this morning it has gotten out of hand. At the end of this message is a
summary of the world according to the PURDUE LSI-11 core gateway. The first
part shows the neighbors which at one time were up, but are at the moment
offline, crashed or worse. The second part shows a mess of 68 apparently bogus
nets (!) presently sloshing over all Internet corespeakers at the moment. I
constructed this list from the full PURDUE routing table by deleting all named
networks and all unnamed networks in the range 128.x.x.x, 129.x.x.x and
192.x.x.x. Some of the remainder are marked unreachable, so are not included
in PURDUE routing updates sent to its neighbors. The others are in fact now
sloshing all over the Internet, overflowing routing tables and crashing at
least three EGPspeakers known to me.

>From the hop counts and first-hop gateways listed, I suspect
counting-to-infinity is in progress on the MILNET side of the mailbridges, so
the bogons might eventually evaporate from the core tables. However, the three
EGPspeakers I watch are now crashing at intervals of a few hours, so the bogon
generator may be barking at those intervals or less. I strongly suspect a
malformed EGP update is being sent to a core gateway, which results not only
in broken tables, but a malformed EGP update being sent back to the remaining
EGP population. While my crashed EGPspeakers may deserve additional anti-bogon
insulation, the bogonspeakers should be found and fried ASAP.

Could it be that some list of gateways within an EGP update has overflowed a
count field or broken a parser?

Dave

Gateway 16 PURDUE 10.2.0.37 (Arpanet) Sun Jan 17 09:52:25 1988 (EST)

Neighbors:
        DOWN: golden-gateway.stanford.edu 10.1.0.11 (Arpanet) (EGP or indirect via EGP)
        DOWN: gateway.rice.edu 10.4.0.62 (Arpanet) (EGP or indirect via EGP)
        DOWN: a.cs.uiuc.edu 10.3.0.37 (Arpanet) (EGP or indirect via EGP)
        DOWN: rita.acs.washington.edu 10.1.0.91 (Arpanet) (EGP or indirect via EGP)
        DOWN: iu.ai.sri.com 10.5.0.2 (Arpanet) (EGP or indirect via EGP)
        DOWN: ISTC 10.1.0.107 (Arpanet)
        DOWN: gold.bacs.indiana.edu 10.7.0.37 (Arpanet) (EGP or indirect via EGP)
        DOWN: princeton.edu 10.7.0.96 (Arpanet) (EGP or indirect via EGP)
        DOWN: oberon.usc.edu 10.0.0.121 (Arpanet) (EGP or indirect via EGP)
        DOWN: ngp.utexas.edu 10.0.0.62 (Arpanet) (EGP or indirect via EGP)
        DOWN: think.com 10.4.0.6 (Arpanet) (EGP or indirect via EGP)
        DOWN: lad 10.6.0.62 (Arpanet) (EGP or indirect via EGP)
        DOWN: YALE 10.2.0.9 (Arpanet) (EGP or indirect via EGP)
        DOWN: 10.7.0.62 (Arpanet) (EGP or indirect via EGP)
        DOWN: 192.5.48.18 (purdue-cs-net) (EGP or indirect via EGP)
        DOWN: potomac.ads.com 10.5.0.25 (Arpanet) (EGP or indirect via EGP)
        DOWN: xn.ll.mit.edu 10.2.0.10 (Arpanet) (EGP or indirect via EGP)
        DOWN: columbia.edu 10.3.0.89 (Arpanet) (EGP or indirect via EGP)
        DOWN: teknowledge-vaxc 10.5.0.11 (Arpanet) (EGP or indirect via EGP)
        DOWN: utah-arpa-gw 10.3.0.4 (Arpanet) (EGP or indirect via EGP)
        DOWN: VAN 10.5.0.63 (Arpanet) (EGP or indirect via EGP)
        DOWN: TEST2 10.2.0.63 (Arpanet) (EGP or indirect via EGP)
        DOWN: 10.7.0.111 (Arpanet) (EGP or indirect via EGP)
        DOWN: 10.0.5.91 (Arpanet) (EGP or indirect via EGP)
        DOWN: att 10.5.0.89 (Arpanet) (EGP or indirect via EGP)

Network Table:
             193.252.102 4 hops (ext) via MILLBL 10.0.0.68 (Arpanet)
             207.255.92 6 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             125 Unreachable
             127 Unreachable
             159.249 5 hops (ext) via MILBBN 10.5.0.5 (Arpanet)
             159.183 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             135.251 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             207.250.89 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             191.151 6 hops (ext) via MILISI 10.2.0.22 (Arpanet)
              19 Unreachable
             207.252.253 6 hops (ext) via MILISI 10.2.0.22 (Arpanet)
             100 6 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             159.250 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             143.151 4 hops (ext) via MILLBL 10.0.0.68 (Arpanet)
             159.59 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             207.250.115 5 hops (ext) via MILARPA 10.2.0.28 (Arpanet)
             207.250.83 6 hops (ext) via MILSAC 10.2.0.80 (Arpanet)
             207.252.247 4 hops via MILDCEC 10.7.0.20 (Arpanet)
             159.255 4 hops (ext) via MILLBL 10.0.0.68 (Arpanet)
             207.255.40 6 hops (ext) via MILSAC 10.2.0.80 (Arpanet)
             207.252.98 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             135.239 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             159.164 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             159.254 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             207.255.253 6 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             207.255.167 6 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             193.255.57 6 hops (ext) via MILISI 10.2.0.22 (Arpanet)
             126 Unreachable
             159.167 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             193.252.249 Unreachable
             199.253.7 6 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             207.252.220 6 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
              84 1 hop (ext) via umn-rei-uc 10.2.0.94 (Arpanet)
              42 Unreachable
             159.89 6 hops (ext) via MILISI 10.2.0.22 (Arpanet)
             207.255.234 6 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             207.253.52 4 hops (ext) via MILLBL 10.0.0.68 (Arpanet)
             143.180 5 hops (ext) via MILBBN 10.5.0.5 (Arpanet)
             193.252.205 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             199.250.83 4 hops (ext) via MILLBL 10.0.0.68 (Arpanet)
             159.235 4 hops via MILDCEC 10.7.0.20 (Arpanet)
             143.252 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             207.252.215 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             207.253.88 5 hops (ext) via MILBBN 10.5.0.5 (Arpanet)
             143.250 6 hops (ext) via MILISI 10.2.0.22 (Arpanet)
             207.253.217 6 hops (ext) via MILISI 10.2.0.22 (Arpanet)
             207.252.249 5 hops (ext) via MILBBN 10.5.0.5 (Arpanet)
             159.180 6 hops (ext) via MILISI 10.2.0.22 (Arpanet)
             207.252.242 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             159.243 4 hops (ext) via MILLBL 10.0.0.68 (Arpanet)
             131.237 4 hops (ext) via MILLBL 10.0.0.68 (Arpanet)
             199.255.174 5 hops (ext) via MILARPA 10.2.0.28 (Arpanet)
             159.149 6 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
              61 Unreachable
             207.252.172 4 hops via MILDCEC 10.7.0.20 (Arpanet)
              60 Unreachable
             207.255.51 6 hops via MILDCEC 10.7.0.20 (Arpanet)
             199.253.217 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             199.253.202 5 hops (ext) via ISI 10.3.0.27 (Arpanet)
             195.253.219 6 hops (ext) via MILISI 10.2.0.22 (Arpanet)
             207.253.147 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             207.253.89 5 hops (ext) via ISI 10.3.0.27 (Arpanet)
             207.252.255 6 hops (ext) via MILISI 10.2.0.22 (Arpanet)
             207.243.181 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
              63 Unreachable
             159.210 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             159.62 5 hops (ext) via MILDCEC 10.7.0.20 (Arpanet)
             207.250.17 5 hops (ext) via MILARPA 10.2.0.28 (Arpanet)



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