ospf->process id vs autonomous system number

[francois emo]

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/ip_r
/iprprt2/1rdospf.htm#xtocid1794737

"Router# show ip ospf interface ethernet 0
(...)
AS 201, (...)
(...)

Table 54: show ip ospf interface Field Descriptions:
AS: AUTONOMOUS SYSTEM NUMBER (OSPF PROCESS ID), (...)"

QUESTION:
i didn't expect the OSPF PROCESS ID to be the AUTONOMOUS SYSTEM NUMBER.

assuming that the description for PROCESS ID is:
"INTERNALLY used identification parameter for an OSPF routing process. It is
locally assigned and can be ANY positive integer. A unique value is assigned
for each OSPF routing process"...

->at which level the concept of "AUTONOMOUS SYSTEM" does apply when using
OSPF?

thanks for your comments
frans

[Matthias Hagen]

Hi,
exact, the router process id is an internal number to deceide eventually between
more ospf domains. OSPF will start talking on the specific interfaces and will
just check if the neighbour is in the same area. If you like to describe that
all your OSPF areas together is similar to your AS it's Ok. But an AS is all
routers or networks under one common management.
EIGRP, IGRP or other will use the term ASwhen you need to specific the routers
ID's. But these protocols don't know anything about AS. The protocoll which is
able to sent and receive information about AS is BGP. If you like to manage your
AS with a little bit of RIP, a little bit of ospf, eigrp or others, this is up
to you. The number you chose in this protocols as a router id, or as number or
something, has realy nothing to do with your real as number. For the specific
routing protocol just means that it should just change information with equal
router ID numbers.
ciao
matze

francois emo schrieb: