Hello,

I got some questions when using the "match ip route-source" command and
would appreciate any input:

1. I was trying to set the metric for all the igrp routed redistributed into
ospf t0 2600 using a route-map. Originally the route 12.0.0.0 showed up with
a metric of 20.

r3#i 12.0.0.0
Routing entry for 12.0.0.0/8
  Known via "ospf 1", distance 110, metric 20, type extern 2, forward metric
64
  Redistributing via ospf 1
  Last update from 135.1.20.4 on Serial0, 00:26:01 ago
  Routing Descriptor Blocks:
  * 135.1.20.4, from 135.1.14.4, 00:26:01 ago, via Serial0
      Route metric is 20, traffic share count is 1

2. The I added a route map igrp-ospf and applied it to the ospf
redistribution process.

route-map igrp-ospf permit 10
 match ip route-source 15
 set metric 2600

r4(config-router)# redistribute igrp 1 subnets route-map igrp-ospf

3. I had thought that I have will have to add an access-list 15 before I see
the metric changes, surprisingly, I noticed that the metric changed right
away without a ACL 15...

r3#i 12.0.0.0
Routing entry for 12.0.0.0/8
  Known via "ospf 1", distance 110, metric 2600, type extern 2, forward
metric 64
  Redistributing via ospf 1
  Last update from 135.1.20.4 on Serial0, 00:00:13 ago
  Routing Descriptor Blocks:
  * 135.1.20.4, from 135.1.14.4, 00:00:13 ago, via Serial0
      Route metric is 2600, traffic share count is 1

4. According to cisco's site, the usage for match ip route-source says "To
redistribute routes that have been advertised by routers and access servers
at the address specified by the access list". It is kind of vague and
doesn't explain why I can change the metric without specify ACL...

Any ideas?

Thanks

Richard




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