From: Joseph Brunner (joe@affirmedsystems.com)
Date: Tue Feb 05 2008 - 15:00:46 ARST
>So, if a router is learning 192.168.1.0/24 through ospf and there is a
static route for 192.168.1.0/24 with AD of 110. Thank you in advance.
Read this part. both routes have an AD of 110.
So here goes,
I lab'd it up.
rack1r1#sh ip route ospf
1.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
O 1.1.13.0/24 [110/2] via 172.16.11.11, 00:00:02, FastEthernet0/0
(towards sw1)
But, when I put the static route with ad 110,
ip route 1.1.13.0 255.255.255.0 172.16.11.11 110
it uses the static route instead of ospf
rack1r1#sh ip route 1.1.13.1
Routing entry for 1.1.13.0/24
Known via "static", distance 110, metric 0
Routing Descriptor Blocks:
* 172.16.11.11
Route metric is 0, traffic share count is 1
rack1r1#sh ip route ospf
(nothing)
LOL, I guess even with same AD you can't use two TYPES of routes to load
balance.
-Joe
_____
From: Larry [mailto:cc13lab@gmail.com]
Sent: Tuesday, February 05, 2008 11:30 AM
To: Joseph Brunner
Cc: ccielab@groupstudy.com
Subject: Re: Route preference
That should be a 1 not a 0...
default ad = 0
On 2/5/08, Larry <cc13lab@gmail.com> wrote:
Only the static route would be put into the table as its default ad = 0:
r1#show ip route 150.1.3.3 <http://150.1.3.3/>
Routing entry for 150.1.3.3/32
Known via "ospf 1", distance 110, metric 65, type intra area
Last update from 150.1.13.3 <http://150.1.13.3/> on Serial1/1, 00:00:26
ago
Routing Descriptor Blocks:
150.1.13.3 <http://150.1.13.3/> , from 150.1.3.3 <http://150.1.3.3/> ,
00:00:26 ago, via Serial1/1
Route metric is 65, traffic share count is 1
* 150.1.12.2 <http://150.1.12.2/> , from 150.1.2.2 <http://150.1.2.2/> ,
00:00:26 ago, via Serial1/0.1
Route metric is 65, traffic share count is 1
r1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
r1(config)# ip route 150.1.3.3 <http://150.1.3.3/> 255.255.255.255
<http://255.255.255.255/> 150.1.13.3 <http://150.1.13.3/> 110
r1(config)#^Z
r1#show ip route 150.1.3.3 <http://150.1.3.3/>
Routing entry for 150.1.3.3/32
Known via "static", distance 110, metric 0
Routing Descriptor Blocks:
* 150.1.13.3 <http://150.1.13.3/>
Route metric is 0, traffic share count is 1
-larry
On 2/5/08, Joseph Brunner <joe@affirmedsystems.com> wrote:
Both would be in the routing table. But there will no load balancing unless
cef is disabled (no ip cef). With cef the OLDEST or first learned route is
USED only... so if you want true load balancing using the routing table,
disable cef.
josCEF
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Robert CCIE
Sent: Monday, February 04, 2008 8:07 PM
To: ccielab@groupstudy.com
Subject: Route preference
Hello Everyone,
I was just wondering how a router behaves in these situations. If a
router learns a route through a routing protocol but there is a static
route with the same admin distance configured. Which route would be
installed in the routing table? Or would both be installed? Also, I'm
guessing metrics only matter for that routing protocols process as far
as calculation since a static route has a metric of 0.
So, if a router is learning 192.168.1.0/24 through ospf and there is a
static route for 192.168.1.0/24 with AD of 110. Thank you in advance.
-Robert
This archive was generated by hypermail 2.1.4 : Sat Mar 01 2008 - 16:54:47 ARST