RE: set interface command under route-map

Thanks for posting the output there, Divin. It does a great job of showing
the relationship between your route tables and the CEF table (although R0's
route table is probably the most important here and the one you left out of
your information below).

You'll see that because you have the route-cache entry for the FastEthernet
1/0 interface in your CEF table, your route-map worked - the router found
that interface in the CEF table, can see the associated next hop (11.1.1.2)
and therefore knew where to forward the default route (to R2 only).

Some other cool things to observe (that I've never noticed before) are the
"drop" entries - you'll notice that the router automatically has drop
entries for the Class E range and other miscellaneous entries. I find that
pretty interesting...

Cheers,
 
Jared Scrivener CCIE3 #16983 (R&S, Security, SP), CISSP
Sr. Technical Instructor - IPexpert, Inc.
Telephone: +1.810.326.1444
Fax: +1.810.454.0130
Mailto: jscrivener_at_ipexpert.com

-----Original Message-----
From: Divin Mathew John [mailto:divinjohn_at_gmail.com]
Sent: Wednesday, 6 May 2009 10:55 AM
To: Jared Scrivener
Cc: Anantha Subramanian Natarajan; Cisco certification
Subject: Re: set interface command under route-map

I got it to work.. here's my config
R0
interface FastEthernet0/0
 ip address 10.1.1.1 255.255.255.252
 duplex auto
 speed auto
!
interface FastEthernet1/0
 ip address 11.1.1.1 255.255.255.252
 duplex auto
 speed auto
!
router rip
 version 2
 network 10.0.0.0
 network 11.0.0.0
 default-information originate route-map R0toR1DefaultRoute
 no auto-summary
!
ip http server
ip forward-protocol nd
!
!
!
!
route-map R0toR1DefaultRoute permit 10
 set interface FastEthernet1/0
!

R1#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static
route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

     10.0.0.0/30 is subnetted, 1 subnets
C 10.1.1.0 is directly connected, FastEthernet0/0
     11.0.0.0/30 is subnetted, 1 subnets
R 11.1.1.0 [120/1] via 10.1.1.1, 00:00:08, FastEthernet0/0

R2#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static
route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is 11.1.1.1 to network 0.0.0.0

     10.0.0.0/30 is subnetted, 1 subnets
R 10.1.1.0 [120/1] via 11.1.1.1, 00:00:21, FastEthernet0/0
     11.0.0.0/30 is subnetted, 1 subnets
C 11.1.1.0 is directly connected, FastEthernet0/0
R* 0.0.0.0/0 [120/1] via 11.1.1.1, 00:00:21, FastEthernet0/0

R1, R2 have Ripv2 running .! i was able to do it.! my cef table on R0

R0#sh ip cef
Prefix Next Hop Interface
0.0.0.0/0 drop Null0 (default route handler entry)
0.0.0.0/8 drop
0.0.0.0/32 receive
10.1.1.0/30 attached FastEthernet0/0
10.1.1.0/32 receive
10.1.1.1/32 receive
10.1.1.2/32 10.1.1.2 FastEthernet0/0
10.1.1.3/32 receive
11.1.1.0/30 attached FastEthernet1/0
11.1.1.0/32 receive
11.1.1.1/32 receive
11.1.1.2/32 11.1.1.2 FastEthernet1/0
11.1.1.3/32 receive
127.0.0.0/8 drop
224.0.0.0/4 drop
224.0.0.0/24 receive
240.0.0.0/4 drop
255.255.255.255/32 receive

i didnt tweak anything. the warning message did come.! but its working!
fine.!

Thanking You

Yours Sincerely

Divin Mathew John
divinjohn_at_gmail.com
divin_at_dide3d.com
http://www.dide3d.com
+91 9945430983
+91 9846697191
+974 5008916
PGP PUBLIC KEY BLOCK @ http://www.dide3d.com/divin_Public_PGP_key.txt

On Wed, May 6, 2009 at 10:37 PM, Jared Scrivener
<jscrivener_at_ipexpert.com> wrote:
> Hmmm... Well, based on your own description, do you have a route-cache
> entry?
>
> Think CEF... Find the show command (most start with "sh ip cef") and see
if
> the entry is there. Then test the configuration and see if it works (based
> on the route-cache entry you expect).
>
> Cheers,
>
> Jared Scrivener CCIE3 #16983 (R&S, Security, SP), CISSP
> Sr. Technical Instructor - IPexpert, Inc.
> Telephone: +1.810.326.1444
> Fax: +1.810.454.0130
> Mailto: jscrivener_at_ipexpert.com
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Anantha Subramanian Natarajan
> Sent: Wednesday, 6 May 2009 9:54 AM
> To: Cisco certification
> Subject: set interface command under route-map
>
> Hi All,
>
> I am trying to solve the below requirement and stumbled on understanding
a
> command,which I am trying to use to acheive this requirement.One of the
core
> labworkbook IE lab scenario as something similar requirement as below
>
> The router running rip2(R2) should only send a default-route to a
particular
> neighbor(r3) and not to other.The solution considered is to use
> default-information originate associated with a route-map under rip
process
> as beow
>
>
>
>
> R1-Serial Link--R2 --Ethernet link ---R3
>
> router rip
>
> default-information originate route-map test
>
> !
>
> route-map test permit 10
>
> set interface Ethernetx/x
>
>
>
> Is the above solution would solve the requirement.If so,when I was
referring
> a cisco DOC,it mentions a statement "The *set interface* command is
> supported only over a point-to-point link, unless a route-cache entry
exists
> using the same interface specified in the *set interface* command in the
> route map".Since I am trying to send the deafult route only towards the
> ethernet link(Which I am considering not as point-to-point),will this
> soltion still work ??..May be I am mis-understanding or not knowing the
> basic of point-to-point usage here ? ...Also couldn't under the verbage
> "unless a route-cache entry exists using the same interface specified in
the
> *set interface* command in the route map" ..........Kindly let me know
your
> suggestions/comment.
>
>
>
> Thanks
>
>
>
> Regards
>
> Anantha Subramanian Natarajan
>
>
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Received on Wed May 06 2009 - 11:17:13 ART