On Sun, Apr 09, 2023 at 01:00:23PM +0300, Mantas Mikul?nas wrote:
On Sun, Apr 09, 2023 at 10:17:48AM +0200, Hans Hübner wrote:
Am Fr., 7. Apr. 2023 um 07:36?Uhr schrieb Mantas Mikul?nas <grawity@...>:
I finally decided to add mine, just a pile of old Cisco routers to poke
around (though at the moment I'm not sure if the telebahn x.25 profile is
set up right, as so far I've been only playing with serial links between
identical systems)
Thank you for setting that up!? I could successfully connect to?14704100 after
I had tweaked my configuration.? ?Would you be willing to share your
configuration?? I could not quite figure out how to enable inbound X.29
connections to the router itself.
As far as I could figure out (IOS documentation is *really* scattered):
- "x25 routing" implicitly enables inbound XOT connections in general
(starts listening on TCP port 1998). However, if you define a profile
and associate it with "xot access-group...", then only connections
matching one of the access-lists will be allowed, so make sure the
access-list in question has "permit any".
- "service pad from-xot" is required to allow the router itself to
accept PAD calls via XOT (the default is only to route calls onward),
but the router still needs to be told what its X.121 address is.
(Without an address it won't know what calls are "local".)
- For physical X.25 interfaces, like Serial0/0, "x25 address" can be
set per-interface to define the router's own X.121 address, though of
course not for XOT since there's no interface.
interface Serial0/0
x25 address 147041
(It's enough to dial "pad 147041", not necessarily 14704100.)
- If you have an "x25 profile TELEBAHN dxe" associated to XOT, you can
define the local X.121 address as "x25 address" under that profile:
x25 profile TELEBAHN dxe
x25 address 147041
access-list 10 permit any
xot access-group 10 profile TELEBAHN
So instead of e.g. incoming calls via Serial0/0 being matched against
that interface's address, you have incoming calls from 'any' IP being
matched against the profile's address.
Oh right, and if you have an "x25 profile" associated with Serial0/0,
then you can probably define the "x25 address" under that profile as
well, just like for XOT.
The "lab" has a stack of three Cisco1760's connected via serial, I have
not done anything special to make PAD calls between them -- just define
the routers' local addresses as above, and add "x25 route" entries via
Serial0/0 or whatever is appropriate. (From what I remember, things
*stopped* working once I tried to apply the TELEBAHN profile...)
interface Serial0/0
description "Connected to Cisco1760-mid Serial0/0"
encapsulation x25 dce
clockrate 64000
no ip address
x25 address 147041
x25 route ^147042 interface Serial0/0
x25 route ^147043 interface Serial0/1
x25 route ^(...)(...) xot dns \2.\1.x25.org
! local host entry
x25 host Cisco1760-top 147041
! address book for 'pad' command
x25 host mid 147042
x25 host btm 147043
--
Mantas Mikul?nas
