Re: (PM) Avalanche! Help! (fwd)

Jon Lewis (jlewis@inorganic5.fdt.net)
Mon, 26 Jan 1998 00:49:18 -0500 (EST)

On 26 Jan 1998, Chris Adams wrote:

> A filter on the port with the default route can be used to capture
> these, but then the packets just die. Shouldn't the PM instead return a
> host unreachable (or maybe network unreachable) packet? If ComOS had a
> null interface (bit bucket) and had a default route to null with a high
> metric for advertised addresses, this wouldn't be a problem.

I agree routing the pool to null0 would seem cleaner, but I finally spent
a few minutes setting up a filter for ether0 output, and it does now
generate host unreach:

yoda:~$ traceroute -i 205.229.60.33
traceroute to 205.229.60.33 (205.229.60.33), 30 hops max, 40 byte packets
1 pm1.fdt.net (205.229.48.10) 2 ms 10 ms 2 ms
2 ISDN-2.pm1.gnv.fdt.net (205.229.60.33) 207 ms 96 ms 32 ms
yoda:~$ traceroute -i 205.229.60.34
traceroute to 205.229.60.34 (205.229.60.34), 30 hops max, 40 byte packets
1 pm1.fdt.net (205.229.48.10) 2 ms 3 ms 2 ms
2 pm1.fdt.net (205.229.48.10) 2 ms !H 2 ms !H 2 ms !H

I'd rather fix it by routing rather than filtering...but it works.

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