From: Johnny Tsao (johnnyt@xxxxxxxxxx)
Date: Tue Apr 23 2002 - 00:49:48 GMT-3
but are there other ways to configure unicast with eigrp?
http://www.cisco.com/warp/public/103/eigrpfaq.shtml#Q9
Q. What does the neighbor statement in the EIGRP configuration section do?
A. Although the neighbor command is accepted by the Cisco IOSR parser, it
should not be used. The neighbor statement does not behave as intended and
can have a negative effect on EIGRP neighbors. To follow the bug ID link
below and see detailed bug information, you must be a registered user and
you must be logged in.
See CSCdv19648 for more information.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Alex Paulino
Sent: Monday, April 22, 2002 7:25 PM
To: Jason Gardiner
Cc: ccielab@groupstudy.com
Subject: RE: Eigrp Unicast over NBMA
Hi there.
It means that if I configure 2 routers like the following I should have
adjacencies?
Router 1
!
interface serial 2/0
ip add 155.10.123.1 255.255.255.0
encap frame-relay
frame-relay map ip 155.10.123.2 102 broadcast
!
router eigrp 12
neighbor 155.10.123.1 serial 2/0
!
Router 2
!
interface serial 2/0
ip add 155.10.123.1 255.255.255.0
encap frame-relay
frame-relay map ip 155.10.123.1 201 broadcast
!
router eigrp 12
neighbor 155.10.123.2 serial 2/0
!
Are those basic configs ok or did I miss anything?
-----Original Message-----
From: Jason Gardiner [mailto:gardiner@sprint.net]
Sent: Mon 4/22/2002 10:58 PM
To: Alex Paulino
Cc: ccielab@groupstudy.com
Subject: Re: Eigrp Unicast over NBMA
Okay, I tried this and this is what I found:
Side 1 does not have a paasive interface or a neighbor. Debug shows EI
GRP
as multicasts:
2d00h: IP: s=155.100.15.1 (Ethernet0/0), d=224.0.0.10, len 60, rcvd 2
2d00h: IP: s=155.100.15.5 (local), d=224.0.0.10 (Ethernet0/0), len 60,
sending broad/multicast
2d00h: IP: s=155.100.56.5 (local), d=224.0.0.10 (Serial1/0), len 60,
sending bro
Side 2 has a neighbor statement but does not have a passive interface:
10w1d: IP: s=155.100.6.6 (local), d=224.0.0.10 (Loopback0), len 60,
sending broad/multicast
10w1d: IP: s=155.100.6.6 (Loopback0), d=224.0.0.10, len 60, rcvd 2
10w1d: IP: s=155.100.56.6 (local), d=155.100.56.5 (Serial0), len 60,
sending
Notice how EIGRP is multicast over the non-neighbor interfaces and unic
ast
over the neighbor interface.
Now, side 2 with passive interface on serial 0:
10w1d: IP: s=155.100.56.5 (Serial0), d=224.0.0.10, len 60, rcvd 2
10w1d: IP: s=155.100.56.5 (Serial0), d=224.0.0.10, len 60, rcvd 2
10w1d: IP: s=155.100.6.6 (local), d=224.0.0.10 (Loopback0), len 60,
sending broad/multicast
It's receiving multicast hellos from 155.100.56.5, but is not sending a
ny
packets out that interface.
Conclusion:
Neighbor causes the EIGRP packets to use unicast.
Passive-interface works like OSPF and prevents hellos from being
propagated on the interface in question. THus, adjacencies will not fo
rm.
Thanks,
Jason Gardiner
Supervisor, Engineering Services
Sprint Internet Backbone Operations
"You can swim all day in the Sea of Knowledge and
still come out completely dry. Most people do."
Norton Juster
On Mon, 22 Apr 2002, Alex Paulino wrote:
> Hi all, how to configure the unicast neighbor over nbma with Eigrp?
>
> I'm using:
>
> RA)
> router eigrp 30
> no auto-summary
> neighbor 10.1.1.2 interface serial 0.1
> passive-interface serial 0.1
>
> RB)
> router eigrp 30
> no auto-summary
> neighbor 10.1.1.1 interface serial 1.1
> passive-interface serial 1.1
>
> All Frame-relay maps are created, but the neighbor never up.
>
> Thanks for help...
>
> alex
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