From: xander (xander@xxxxxx)
Date: Thu Apr 12 2001 - 15:33:36 GMT-3
Hello Richard,
It's a good idea, but I completelly do not agree with it.
IGRP could not have _CLASSLESS_ routes at all!!!
So, first access-list line is worthless...
Yes, you are right about ospf which is classless and transform subnet
information in their pachets and LSAs. But the only classfull routes
exist in IGRP and after redistribution they inserted into OSPF as
external metric 1 (or 2).
RG> Hi Phil,
RG> This route-map that you are using is being applied to the routes being
RG> redistributed into OSPF not into IGRP. OSPF should accept any route that IG
RP
RG> has to offer, being classless it does not care about the different subnet.
RG> So this route-map is being used to stop the following routes going into the
RG> OSPF process:
RG> 137.20.100.32 0.0.0.31
RG> 137.20.240.0 0.0.0.255
RG> That is all!!!
RG> Rich
RG> On Apr 11, 6:29pm, Virnoche, Phil chatted about:
>> Subject:CCbootcamp Lab 8
>> All-
>>
>> I need some help in figuring out what this route map is doing.... R5 is the
>> hub router in this excercise.R4 is a PtoP spoke runnning IGRP. R5 is running
>> IGRP and OSPF and doing mutual redistribution between the two.
>>
>> Here is my head scratcher,........ The lab answer has route-map filter_igrp
>> in its redistribution statement. Why? As I see it, none of these routes
>> would be fed into IGRP anyway because of the different subnet mask than the
>> IGRP is using,..... What am I overlooking?
>>
>> Anyone else run into this???????
>>
>>
>>
>> R5:
>>
>> router ospf 1
>> redistribute igrp 1 metric 100 metric-type 1 subnets route-map filter_igrp
>> network 137.20.25.2 0.0.0.0 area 2
>> network 137.20.64.0 0.0.15.255 area 0
>> network 137.20.100.32 0.0.0.31 area 1
>> network 137.20.224.5 0.0.0.0 area 0
>> network 137.20.240.1 0.0.0.0 area 0
>> area 1 virtual-link 200.200.100.1
>> area 1 virtual-link 137.20.33.33
>> !
>> router igrp 1
>> redistribute ospf 1 metric 2000 100 255 1 1500
>> passive-interface BRI0
>> passive-interface Ethernet0
>> passive-interface Serial0.1
>> passive-interface Serial1
>> network 137.20.0.0
>> !
>> ip classless
>> ip route 137.20.81.0 255.255.255.0 137.20.86.1
>> ip route 137.20.82.0 255.255.255.0 137.20.86.1
>> no logging console
>> access-list 1 permit 137.20.100.32 0.0.0.31
>> access-list 1 permit 137.20.240.0 0.0.0.255
>> access-list 1 permit 137.20.64.0 0.0.0.255
>> access-list 1 permit 137.20.224.0 0.0.0.255
>> access-list 2 permit any
>> !
>> route-map filter_igrp deny 10
>> match ip address 1
>> !
>> route-map filter_igrp permit 20
>> match ip address 2
>> !
>>
>>
>>
>>
>> R4:
>> !
>> !
>> no ip domain-lookup
>> !
>> interface Ethernet0
>> ip address 137.20.40.17 255.255.255.240
>> !
>> interface Serial0
>> no ip address
>> shutdown
>> no fair-queue
>> !
>> interface Serial1
>> ip address 137.20.200.18 255.255.255.240
>> encapsulation frame-relay
>> ip split-horizon
>> keepalive 15
>> clockrate 2000000
>> frame-relay lmi-type ansi
>> !
>> router igrp 1
>> network 137.20.0.0
>> !
>> ip classless
>> ip default-network 200.200.200.0
>> !
>>
>>
>>
>> Philip G. Virnoche CCNA
>> Network Engineer - AT&T Wireless
>> phone: 425.580.5239
>> cell: 206.601.3134
>>
>> "HAM AND EGGS - A day's work for a chicken; A lifetime commitment for a
>> pig."
>>-- End of waffle from Virnoche, Phil
-- WBW, xander mailto:xander@adt.ru CCNA, CCNP+VoiceAccess, CCIE first attempt in Brussels 19-20, April, 2001...
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