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Re: (ASCEND) OSPF on Cisco 2501 and Maxes

Hi,

In article <b7e589e792ef@news.allcon.net> you wrote:

[...]
>If a LAN user (who usually dials to 1st Max) dials to 2nd Max, I have to
>change the route statement on the Cisco router.  Will OSPF solve this?  

You will not need any static routes for your dial-in customers if you
make sure that your entire backbone/area 0 speaks OSPF. Once a login
is accepted, the access device will propagate the route via OSPF to all
other OSPF routers in the area. Likewise when the link goes down, the
route is removed from all routing tables. Depending on the amount of
routes, you probably want to aggregate the announcement of your  
dial-in subnets on each Maxen. The advantage is that only the subnets 
are announced, not a /32 route for every dial-in user.

>if so, which software release should I use for 4004s (I'm using tbak.m40
>right now)  Max 6000 already has OSPF feature in its software.

For the Max 4000 you could use version 5.0Ap48 (K56flex) or 6.1.7 (V90).
Also make sure to adjust the ospf priority. A Max (at least the 4000)
should *never* become designated router or backup DR. So since you have
enough Cisco routers to handle the management, set the priority on the 
Maxen to 0.

>So far, I've entered these statements to the Cisco router:
>     router ospf 1
>     network 0.0.0.0 255.255.255.255 area 0

>Do I need additional statements here?

First of all you need to make sure that all the routers in your area 0
are within the same IP subnet. The network statement basically tells 
your router on which interfaces it should speak OSPF. You will probably
also want to originate a default route on your border router, this saves
you the hassle of setting it on all the OSPF routers in area 0. This is
how we do it:

Sample Cisco:

interface Ethernet0/0
[...]
 ip address 212.51.0.2 255.255.255.128
[...]
 ip ospf authentication-key 7 CRYPTEDSECRET
 ip ospf priority 5

router ospf 1028
 redistribute connected subnets
 redistribute static subnets
 passive-interface Serial1/0
 passive-interface Serial1/1
 passive-interface Serial1/2
 passive-interface Serial1/3
 network 212.51.0.0 0.0.0.127 area 0
 default-information originate always

Sample Max:
OSPF options...
>RunOSPF=Yes
 Area=0.0.0.0
 AreaType=Normal
 HelloInterval=10
 DeadInterval=40
 Priority=0
 AuthType=Simple
 AuthKey=thesecret
 KeyId=N/A
 Cost=1
 ASE-type=N/A
 TransitDelay=1
 RetransmitInterval=5
[...]

Hope it helps... :)

-- 
Oliver J. Albrecht <oj@nexus.flensbone.net>
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