Ascend Archive
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Re: (ASCEND) Perm link problems
At 12:14 1998/08/05 +1000, Gavin Cato wrote:
>The problem is that after they have connected they can ping the Max and our
>2 cisco routers *and* anything external to our network but cannot ping any
>other machine local in our network - which is kinda essential for dns and
>proxy etc...
>
>The Max is on 203.2.239.12 - It's default gateway is 203.2.239.5
>
>The perm modem has been assigned 203.2.239.69/32 on the max profile.
so the IP address of the remote user is logically part of the Ethernet, yes?
>On the Cisco I have entered
>
>ip route 203.2.239.69 255.255.255.255 203.2.239.12
so you are seeing exactly what you should with this configuration,
the two ciscos have an explicit route to know how to reach this single address,
the max has a "connected" route to know how to reach it.
How are other systems on the ethernet supposed to know how to reach it?
The address in question is supposed to be on the LAN so each station
is going to send an ARP request in order to know where to send
unless each and every station has a specific route for that address.
the solutions are, in order of my personal preference:
1> don't use an address out of the logical LAN address space,
use subnets from another block to slice out a /30.
(this is not feasable for some because of lack of address space)
2> use proxy arp on the Max
(Ethernet->Mod Config->Ether Opts->Proxy Mode=Active)
3> publish the proxy arp using one of the ciscos, or a workstation
on the LAN that understands and can do Proxy arp for an address not its own.
4> put a static route into every station on the LAN.
(tedious to setup and to maintain properly)
-Jim H
----
Jim Howard Sr Network Engineer Lyceum Internet
jhoward@lyceum.com http://www.lyceum.com/ 404.248.1733
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