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RCN headache, on day 1



In a previous episode Sheldon Dubrowin said...

:: I've heard of using net 10 for the loopback addresses of routers,
:: but not usually in the backbone of a large ISP.

it's done fairly commonly by some pretty big players.. imho it's not
really a good idea as some big networks filter rfc 1918 addresses at
ingress and in that case any traffic these routers generate won't get
back to the hosts on the other networks.. this is a problem with things
like traceroute and more importantly Path MTU discovery where the
router must get ICMP back to a host..

but it is quite common.

-P
-
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