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Re: Routing through non-addressable space???
On Fri, 25 Jan 2002 18:46:55 PST, Simon Higgs <[email protected]> said: > Can someone explain this trace to me. How on earth did the 10.0.0.0 network > get inserted into the last hop? > > # IP address Host name Round trip time > > 4 22.214.171.124 GSR1-SRP4-0.lsanhe4.we.mediaone.net 64 ms > 5 126.96.36.199 GSR2-SRP4-0.lsanhe3.we.mediaone.net 71 ms > 6 188.8.131.52 Unavailable 79 ms > 7 184.108.40.206 gbr2-p100.la2ca.ip.att.net 94 ms > 8 No response > 9 220.127.116.11 ggr1-p340.la2ca.ip.att.net 110 ms > 10 18.104.22.168 att-gw.la.home.net 112 ms > 11 22.214.171.124 wbb1-pos2-0.pop1.ca.home.net 120 ms > 12 10.252.25.118 Unavailable 134 ms > 13 126.96.36.199 Unavailable 141 ms Some naughty person used RFC1918 address space to number their point-to-point links? That's OK, until they throw an ICMP error that gets tossed by a border router that does bogon filtering. Single biggest reason why Path MTU Discovery doesn't work, except for maybe sites that stomp on all the ICMP traffic they see.... -- Valdis Kletnieks Computer Systems Senior Engineer Virginia Tech