From: LASSERRE Grégory (gregory.lasserre@xxxxxxxx)
Date: Sat Mar 11 2000 - 15:09:03 GMT-3
Hi,
sorry to reply after a while, but i think i found
the answer in TCP/IP vol I - I quote :
In the case, the primary interface is also running OSPF,
"OSPF sees secondary addresses as stub networks and
therefore will not send Hellos on them, consequently, no adjencies
can be established on secondary networks"
Regards.
Greg.
> -----Message d'origine-----
> De: Gao, Lingping [SMTP:Lingping.Gao@tfn.com]
> Date: jeudi 2 mars 2000 18:13
> À: 'ejobson'; 'Jason T. Rohm'; 'Ccielab (E-mail)'
> Objet: RE: OSPF and Secondary Addresses
>
> This is a known issue:
>
> If primamry interface is part of ospf area 0, then the secondary address
> will be able to format neighboure relations. Otherwise won't. (Check V1
> of
> routing TCP/IP)
>
> If you out another router in this segment with a primary address and put
> the
> interface into ospf area 0, the second should work.
>
> RIP EIGRP etc doesn't have this issue.
>
>
>
> -----Original Message-----
> From: ejobson [mailto:ejobson@tns-inc.com]
> Sent: Thursday, March 02, 2000 8:56 AM
> To: 'Jason T. Rohm'; 'Ccielab (E-mail)'
> Subject: RE: OSPF and Secondary Addresses
>
>
> I had a similar problem to this with secondary addressing with EIGRP. By
> summarising using the 'ip summary-address eigrp 1 10.45.1.0
> 255.255.255.192' on ethernet 0 allowed a common route into the eigrp area
> summarising subnets 14,22,30,38,46&54 into one update.
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Jason T. Rohm
> Sent: Wednesday, March 01, 2000 4:47 PM
> To: Ccielab (E-mail)
> Subject: OSPF and Secondary Addresses
>
>
> I think I know the answer, but I am hoping that someone can confirm this
> for me.
>
> I have four routers on an ethernet segment. They are all part of area 0.
> The fourth router refuses to form adjacencies with the other three. This
> fourth router has an IP address that is from a different range, but has a
> secondary address that is on the same subnet as the other three.
>
> If I debug ip ospf events, I get a message that the hello packets are from
> the wrong address.
>
> Is this normal? Is there a way to make the fourth OSPF router join the
> area
> w/out swapping the primary and secondary addresses?
>
> -Jason T. Rohm
> jtrohm@athenet.net
>
>
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:23:04 GMT-3