From: octavio@sztele.com
Date: Mon Mar 03 2003 - 14:24:28 GMT-3
Hi
I4m working with ISIS for the first time. I4m reading the Doyle book but
something seem not to work in the way it is said:
- It is said, CLNS routing must be enabled and because routers use CLNS
PDUs instead of IP packet to do adyacencies, it could be possible routers
with different IP address to become adyacents.
I have seen it is not necesary to enable CLNS routing to do ISIS (only for
IP) works. And then, without CLNS routing, routers in different networks
dont became adyacents.
- It is said IP process can not directly interpret the ATT bit. It is
necesary to enable ISIS for CLNS on the interfaces in adition to ISIS for
IP. In this way, L1 routers have a default route to the L1/l2 router.
But I have seen it is not necesay. If we disable CLNS routing the L1
routers see ATT=1 and install a default route to the L1L2 router.
- It is said too, you can configure a default route 0.0.0.0/0 on L1/L2
routers and do ISIS to advertise it with the command (default-information
originate) to the L1 routers inside the area. But in this way, the default
route is advertise only inside the L2 LSPs and then the L1 routers dont see
the default route.
Thanks
Octavio
This archive was generated by hypermail 2.1.4 : Sat Apr 05 2003 - 08:51:31 GMT-3