From: Fred Ingham (fningham@xxxxxxxxxxxxxxxx)
Date: Sun Dec 10 2000 - 03:13:22 GMT-3
Just for clarification: if the igrp link is configured for /24, the
igrp process will accept /24; classful routes /8, /16,
an /24 for A, B, C class addresses; and also /32 host routes.
Cheers, Fred.
Tony Olzak wrote:
>
> This is because the IGRP-enabled link is using a 24-bit network mask. This
> means IGRP will ONLY accept 24-bit mask routes from 134.1.x.x networks.
>
> Tony
>
> ----- Original Message -----
> From: "Robert DeVito" <robertdevito@hotmail.com>
> To: <fningham@worldnet.att.net>
> Cc: <ccielab@groupstudy.com>
> Sent: Thursday, December 07, 2000 7:43 AM
> Subject: Re: Wording
>
> > Going back to the following scenerio:
> >
> > Configure IGRP between R3 and R4. Ensure that all routers in the
> > network can access all interfaces on all the routers. Configuring
> > ONLY R3, send a default route to R4 without using static routes,
> > route maps, or summary addresses.
> >
> >
> > R2 (E0 - 134.1.32.1/20)
> > |e0
> > | OSPF Area 0
> > |e0
> > R3 (E0 - 134.1.32.2/20, S0 - 134.1.31.1/24)
> > \s0
> > \ IGRP
> > \s0
> > R4 (s0 - 134.1.31.2/24)
> >
> > I have having a hard time getting the 134.1.32.X network to be
> redistributed
> > into IGRP. Here are my configs. I am asumming that after I am able to get
> > the 134.1.32.X network to redistribute into IGRP, I would add the "ip
> > default-netw 134.1.32.0" command to r3, then redistribute IGRP into OSPF
> in
> > R3, and that problem should be solved?????
> >
> > Thanx in advanced.
> >
> > R3 Config:
> > interface Ethernet0/0
> > ip address 134.1.32.2 255.255.240.0
> > ip irdp
> > ip irdp multicast
> > ip irdp preference 600
> > !
> > interface Serial0/0
> > ip address 134.1.31.1 255.255.255.0
> > no ip mroute-cache
> > clockrate 2000000
> > !
> > router ospf 1
> > summary-address 134.1.32.0 255.255.255.0
> > redistribute connected
> > network 134.1.32.0 0.0.0.255 area 0
> > default-metric 100
> > !
> > router igrp 1
> > redistribute ospf 1
> > passive-interface Ethernet0/0
> > network 134.1.0.0
> > !
> > ip classless
> > !
> > Gateway of last resort is not set
> >
> > 134.1.0.0/16 is variably subnetted, 4 subnets, 3 masks
> > O IA 134.1.3.0/24 [110/74] via 134.1.32.1, 00:00:28, Ethernet0/0
> > C 134.1.31.0/24 is directly connected, Serial0/0
> > C 134.1.32.0/20 is directly connected, Ethernet0/0
> > O IA 134.1.48.0/25 [110/84] via 134.1.32.1, 00:00:28, Ethernet0/0
> > 150.100.0.0/24 is subnetted, 1 subnets
> > O E2 150.100.1.0 [110/500] via 134.1.32.1, 00:00:28, Ethernet0/0
> > I 150.200.0.0/16 [100/8976] via 134.1.31.2, 00:00:11, Serial0/0
> >
> > Router 4 Config:
> > ip subnet-zero
> > no ip domain-lookup
> > !
> > interface Loopback0
> > ip address 150.200.2.1 255.255.255.0
> > !
> > interface Serial0
> > ip address 134.1.31.2 255.255.255.0
> > no fair-queue
> > !
> > interface Serial1
> > no ip address
> > shutdown
> > !
> > interface TokenRing0
> > no ip address
> > shutdown
> > !
> > router igrp 1
> > network 150.200.0.0
> > network 134.1.0.0
> > !
> > ip classless
> > !
> > Gateway of last resort is not set
> >
> > 150.200.0.0/24 is subnetted, 1 subnets
> > C 150.200.2.0 is directly connected, Loopback0
> > 134.1.0.0/24 is subnetted, 2 subnets
> > I 134.1.3.0 [100/52100] via 134.1.31.1, 00:00:52, Serial0
> > C 134.1.31.0 is directly connected, Serial0
> > I 150.100.0.0/16 [100/52100] via 134.1.31.1, 00:00:52, Serial0
> >
> > **** As you can see, I can see other routes that are being redistributed
> > into IGRP from OSPF, I just can not see the 134.1.32.X network.
> >
> > ----Original Message Follows----
> > From: Fred Ingham <fningham@worldnet.att.net>
> > Reply-To: fningham@worldnet.att.net
> > To: Robert DeVito <robertdevito@hotmail.com>
> > Subject: Re: Wording
> > Date: Wed, 06 Dec 2000 20:23:22 -0500
> >
> > Or better yet an OSPF route that is a different subnet. For instance if
> > you configured r3-r4 link with 172.16.65.0/24
> > you couldn't use 172.16.0.0 as the default network. If the link
> > between r3-r2 were 172.17.x.y then you could use 172.17.0.0 as the
> > default network.
> >
> > The network must exist in the routing table (of r3) as a connected,
> > static, or learned route. You could configure 10.1.1.3 as a loopback on
> > r3 and use 10.0.0.0 as the default network for instance. Remember to
> > advertise the default network under IGRP on r3 with a network statement.
> >
> > Fred.
> >
> > Robert DeVito wrote:
> > >
> > > Fred,
> > >
> > > I am assuming if I can not use the classless address of the link
> > > between R3 and R4 as the "default-network", I would have to append the
> > > ip default-network command to a OSPF learned network? i.e. the link
> > > between R3 and R2??
> > >
> > > Robert
> > >
> > > ----Original Message Follows----
> > > From: Fred Ingham
> > > Reply-To: Fred Ingham
> > > To: Robert DeVito , ccielab@groupstudy.com
> > > Subject: Re: Wording
> > > Date: Wed, 06 Dec 2000 17:05:49 -0500
> > > You also would have to redistribute IGRP into OSPF on r3 to ping the
> > > R4
> > > addresses from r2. Best to use route maps on both OSPF and IGRP
> > > redistributions to prevent routing loops. Default network is the way
> > > to
> > > get a default into IGRP. The default network should be in r3's routing
> > > table and not the same classful address configured on r4. r4 should
> > > have the ip classless command and check that the r4 interface to r3
> > > has
> > > split horizon enabled.
> > > Fred.
> > > Robert DeVito wrote:
> > > >
> > > > R2
> > > > |
> > > > | Area 0
> > > > |
> > > > R3-------------------R4
> > > >
> > > > OSPF is configured between R2 and R3 (working good). I am trying to
> > > > figure out what they mean below and how would you do that? Would you
> > > > configure IGRP between R3 and R4 and then redistribute OSPF into
> > > IGRP
> > > > and use the " ip default-network" in R3?
> > > >
> > > > Configure IGRP between R3 and R4. Ensure that all routers in the
> > > > network can access all interfaces on all the routers. Configuring
> > > > ONLY R3, send a default route to R4 without using static routes,
> > > route
> > > > maps, or summary addresses.
> > > >
> > > > Thank you,
> > > > Robert DeVito
> > > >
> > > >
> > > ----------------------------------------------------------------------
> > > > Get more from the Web. FREE MSN Explorer download :
> > > > http://explorer.msn.com
> > > >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:26:01 GMT-3