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Re: (ASCEND) Anyone have OSPF working CISCO<->MAX 4004 ?



> Hello,
> 
> Hopefully everyone had a great Thanksgiving.

Mine was great, thanks.

> I currently have 4 MAX 4004's talking OSPF to a CISCO 2514 on the same
> ethernet where the 2514 is the DR with no BDR's on that Ethernet segment.
> 
> I also have this same CISCO 2514 (IOS 11.2) talking OSPF to another 2501
> (IOS 10.3) via a T1 Frame Relay on a sub interface Serial 1.3 configured as
> a network type 'broadcast'. Everything works fine OSPF wise on these devices.
> 
> These are all configured as one area '0.0.0.0'.
> 
> I am now trying to get a MAX 4004 to talk OSPF to the CISCO 2501 via a T1
> Frame relay connection where the MAX is a stand alone unit using the on
> board router/CSU combination in area 0.0.0.0. 

Ok.  NBMA networks are kind of tricky when it comes to OSPF, as they are
not quite broadcast or point-to-point networks.

Try some of these commands to troubleshoot the problem, as I've never done
this exactly (I don't want to do OSPF on a WAN link like that), but I have
the theory behind it.  

1: On Older versions of IOS, you can use the following command under
   routerer ospf <number>:
   neighbor x.x.x.x [priority #] [poll-interval #]
   priority 0 = no DR, poll-interval is how many seconds between hellos

2: Under the sub interface, use this command:
   ip ospf network [broadcast | non-broadcast | point-to-multipoint]
   broadcast makes the WAN look like a LAN, but you'll have to worry about
   DRs and BDRs, so you'll need to use priority to make sure your DR is
   always seen.
   Non-broadcast is for Point-to-point links, and no DR is elected.
   Point-to-multipoint the "Cloud" becomes a single subnet for IP, no DRs
   necessary, but you get tons more LSAs than before with more
   information.

> OSPF is active on the MAX when checking it from the command prompt. And is
> active on the respective sub-interface port on the CISCO.
> 
> I made sure that the Hello, Dead intervals are the same on the CISCO and
> the MAX. Turned off "Auth" just to rule that out for now on that interface
> (S1.4)and the MAX.
> 
> I can't seem to get them to talk..... I have repeatedly looked at both the
> ascend and cisco documentation and it looks like it should pretty much run
> out of the box (well it did anyway when I set up the CISCOs).
> 
> I have the 2 CISCO's configured as Broadcast over the frame and it works
> fine. 
> 
> I can't seem to find a reason that the MAX will not neighbor with the 2501
> over the Frame.

It probably needs to think of the link as point-to-point or
point-to-multipoint for OSPF to work properly.  Also, the area 0.0.0.0
will give you trouble if you decide to start adding other areas.  I
suggest you set it to area 0 instead of 0.0.0.0 (0.0.0.0 can be used as
another area seperate of area 0, but it is my understanding that it is not
the same as area 0).

> I have OSPF configured on the stand alone MAX on the Ethernet side as well
> as the "Connection" side. 
> 
> Thinking this might be an IOS concern I have also tried to get a different
> MAX to talk to the 2514 (IOS 11.2) with the same results.
> 
> Curious if anyone else has this working, any input greatly appreciated.
> 
> Regards,
> -Bill Hamel

Send me a copy of your cisco config off list and I can take a look at it
for you.

Joe Shaw - jshaw@isnync.net
NetAdmin - Insync Internet Services

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