RE: ccbootcamp lab 2

From: rsevier (rsevier@xxxxxxxxxxxxxxxxxxx)
Date: Fri May 04 2001 - 12:02:11 GMT-3


   
Mark- I see what you are saying now. R1 and R3 share the network 10.10.0.0
so it can't be an E2 route to R1 becuase it is directly connected. As for
the 10.3.0.0, is there a routing process associated with that interface?
That was my question when I did that lab.

Raymond

-----Original Message-----
From: mcaplan.cs@clearstream.com [mailto:mcaplan.cs@clearstream.com]
Sent: Friday, May 04, 2001 7:32 AM
To: lkidd@netstarnetworks.com; mcaplan.cs@clearstream.com;
ccielab@groupstudy.com; rsevier@zealousolutions.com
Subject: RE: ccbootcamp lab 2

Raymond,

Yes, but my observation (and the routes shown in the answers from Marc's
labs) show that some of the connected interfaces are redistributed as E2 and
some are not.

R3----frame PVC-----R1

This is from CCbootcamp lab 2 as a reminder

Look at the routing table of R3 below:

Gateway of last resort is 173.168.40.2 to network 0.0.0.0

B 4.0.0.0/8 [200/0] via 173.168.40.2, 01:17:23
     173.168.0.0/24 is subnetted, 1 subnets
C 173.168.40.0 is directly connected, Serial1
     10.0.0.0/8 is variably subnetted, 8 subnets, 3 masks
O 10.10.1.1/32 [110/64] via 10.10.1.1, 02:03:35, Serial0
C 10.10.0.0/16 is directly connected, Serial0
O 10.10.1.5/32 [110/128] via 10.10.1.1, 02:03:35, Serial0
C 10.3.0.0/16 is directly connected, TokenRing0
O IA 10.1.0.0/16 [110/74] via 10.10.1.1, 02:03:35, Serial0
O E1 10.20.0.0/16 [110/84] via 10.10.1.1, 02:03:35, Serial0
C 10.33.2.0/24 is directly connected, Loopback1
C 10.33.1.0/24 is directly connected, Loopback0
     11.0.0.0/16 is subnetted, 1 subnets
O 11.1.0.0 [110/138] via 10.10.1.1, 02:03:36, Serial0
B 12.0.0.0/8 [20/0] via 10.10.1.1, 00:27:56
B 41.0.0.0/8 [200/0] via 173.168.40.2, 01:17:26
     44.0.0.0/24 is subnetted, 1 subnets
B 44.1.1.0 [200/0] via 173.168.40.2, 01:17:26
     137.20.0.0/24 is subnetted, 1 subnets
O E1 137.20.20.0 [110/84] via 10.10.1.1, 02:03:37, Serial0
B 177.1.0.0/16 [20/0] via 10.10.1.1, 00:27:56
S* 0.0.0.0/0 [1/0] via 173.168.40.2

There are 5 connected interfaces. The command 'redist connec subnet' on R3
produces the following routing table on R1

Gateway of last resort is 10.10.1.3 to network 0.0.0.0

B 4.0.0.0/8 [20/0] via 10.10.1.3, 01:11:21
     173.168.0.0/24 is subnetted, 1 subnets
O E2 173.168.40.0 [110/20] via 10.10.1.3, 01:39:03, Serial0.2
     10.0.0.0/8 is variably subnetted, 9 subnets, 3 masks
C 10.10.0.0/16 is directly connected, Serial0.2
O 10.10.1.3/32 [110/64] via 10.10.1.3, 02:00:39, Serial0.2
O 10.10.1.5/32 [110/64] via 10.10.1.5, 02:00:39, Serial0.2
O 10.3.0.0/16 [110/70] via 10.10.1.3, 02:00:39, Serial0.2
C 10.1.0.0/16 is directly connected, Ethernet0
C 10.20.0.0/16 is directly connected, Serial0.1
O E2 10.33.2.0/24 [110/20] via 10.10.1.3, 01:39:04, Serial0.2
O E2 10.33.1.0/24 [110/20] via 10.10.1.3, 01:39:04, Serial0.2
O IA 10.33.0.0/16 [110/65] via 10.10.1.3, 02:00:40, Serial0.2
     11.0.0.0/16 is subnetted, 1 subnets
O 11.1.0.0 [110/74] via 10.10.1.5, 02:00:41, Serial0.2
B 12.0.0.0/8 [200/0] via 11.1.1.6, 00:26:13
B 41.0.0.0/8 [20/0] via 10.10.1.3, 01:11:23
     44.0.0.0/24 is subnetted, 1 subnets
B 44.1.1.0 [20/0] via 10.10.1.3, 01:11:23
C 192.168.1.0/24 is directly connected, Loopback0
     137.20.0.0/24 is subnetted, 1 subnets
D 137.20.20.0 [90/2195456] via 10.20.1.1, 02:00:41, Serial0.1
B 177.1.0.0/16 [200/0] via 11.1.1.6, 00:26:13
O*E1 0.0.0.0/0 [110/564] via 10.10.1.3, 02:00:41, Serial0.2

As you can see there are only 3 E2 routes. What about the other 2:
ie 10.10.0.0/16 and 10.3.0.0/16 .

Regards

Mark

> ----------
> From: rsevier[SMTP:rsevier@zealousolutions.com]
> Sent: Freitag, 4. Mai 2001 16:20
> To: Lachlan Kidd; mcaplan.cs@clearstream.com; ccielab@groupstudy.com
> Subject: RE: ccbootcamp lab 2
>
> Mark- You can use a route map to redistribute only the connected
> interfaces
> that you wish:
>
> redistribute connected subnets route-map muther
>
> access-list 1 permit 173.168.40.0 0.0.0.255
> route-map muther permit 10
> match ip address 1
>
> and Lachlan is right about it redistributing everything that is showing up
> as connected in the route table.
>
> Raymond
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Lachlan Kidd
> Sent: Thursday, May 03, 2001 1:53 AM
> To: mcaplan.cs@clearstream.com; ccielab@groupstudy.com
> Subject: RE: ccbootcamp lab 2
>
>
> Hi Mark,
> I think the answer goes something like this. The 'redistribute'
> command
> only works on what is in the route table. If you redistribute IGRP routes
> then anything with an I next to it will get redistributed. The same
> applies
> to connected routes. If it's in the route table with a 'C' next to it, it
> will get redistributed regardless of what protocol is running on that
> interface. HTH, feel free to let me know if I've missed the point
> completely.
> Regards,
> Lachlan
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> mcaplan.cs@clearstream.com
> Sent: Thursday, 3 May 2001 6:12:PM
> To: ccielab@groupstudy.com
> Subject: FW: ccbootcamp lab 2
>
>
> Has anybody got any advice with respect to this one - see thread below:
>
> The fundamental question is :
>
> Does 'redistribute connected subnets' put E2 routes into OSPF even for
> interfaces that are part of the OSPF process ?
>
> Thanks
>
> Mark
>
> > ----------
> > From: TCN CAPLAN Mark - Service Provider
> > Sent: Mittwoch, 2. Mai 2001 16:11
> > To: 'ccielab@groupstudy.com'
> > Subject: ccbootcamp lab 2
> >
> > Hi,
> >
> > I've got a question about Marc's bootcamp lab2.
> >
> > The routing table for R1 shows two subnets advertised as E2 routes plus
> > the summary:
> >
> > O E2 10.33.2.0/24 [110/20] via 10.10.1.3, 00:00:01, Serial0.2
> > O E2 10.33.1.0/24 [110/20] via 10.10.1.3, 00:00:01, Serial0.2
> > O IA 10.33.0.0/16 [110/65] via 10.10.1.3, 00:00:02, Serial0.2
> >
> > Now the IA route comes from the 'area 3 range 10.33.0.0 255.255.0.0'
> > statement on R3. And the E2 routes evidently come from the 'redistribute
> > connected subnets' command on R3.
> >
> > I dont really understand why the E2 routes are there. The loopback
> > interfaces concerned are in Area3 and part of the OSPF process. Its not
> as
> > if the other connected interfaces are redistributed as E2 eg 10.3.1.1/16
> > which is part of Area 0. So why these 2 subnets ? My understanding was
> > that 'redistribute connected subnets' would only redistribute subnets on
> > connected interfaces if they weren't part of the OSPF process. But the
> > evidence shows otherwise. Is the rule that it redistributes any
> interfaces
> > in a different area as E2 aswell.
> >
> > Any help would be appreciated
> >
> > Thanks
> >
> > Mark
> >
>
>
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