From: Gupta, Gopal (NWCC) (gopal.gupta@hp.com)
Date: Thu Nov 08 2007 - 05:50:15 ART
Hi Ahsan,
As far as I know split horizon cannot block OSPF LSAs.
What you can do is filter routes on R3 using Distance 255 for the route
coming from R5.
HTH
Gops
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Ahsan Mohiuddin
Sent: Thursday, November 08, 2007 14:01
To: ccielab@groupstudy.com
Subject: ip split horizon letting ospf routes slip through
Importance: Low
hello group,
i have routers R1, R3 (FR spokes) connected to Hub R5. R1 is advertising
route 155.2.146.0 to R5, but I do not want R5 to send this update to R3.
So, I have configured "ip split-horion" under R5's physical interface
(subinterfaces not used). But it seems R3 is still learning the route
from R1:
O 155.2.146.0 [110/65] via 155.2.13.1, 00:10:27, Serial1/0
[110/65] via 155.2.0.1, 00:10:27, Serial1/1
Config of R5
interface Serial1/0
ip address 155.2.0.5 255.255.255.0
encapsulation frame-relay
ip split-horizon
ip ospf priority 2
frame-relay map ip 155.2.0.1 501
frame-relay map ip 155.2.0.3 503
frame-relay map ip 155.2.0.4 504
end
Config of R3
interface Serial1/1
ip address 155.2.0.3 255.255.255.0
encapsulation frame-relay
ip ospf priority 0
serial restart-delay 0
no dce-terminal-timing-enable
frame-relay map ip 155.2.0.5 305
end
Config of R1
interface Serial1/0
ip address 155.2.0.1 255.255.255.0
encapsulation frame-relay
ip ospf priority 0
serial restart-delay 0
no dce-terminal-timing-enable
frame-relay map ip 155.2.0.5 105
end
Any idea what i am doing wrong here?
Thanks in adv
-Ahsan
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This archive was generated by hypermail 2.1.4 : Sat Dec 01 2007 - 06:37:28 ART