From: Dezhong Cai (dcai@xxxxxxxxx)
Date: Fri Dec 08 2000 - 02:07:55 GMT-3
Hi,
Why you need the following "ip irdp" config? To my know, the "ip irdp" is
only used when there is no any ip routing. But on the R3 and R4, we do have
routing , right?
>> > R3 Config:
>> > interface Ethernet0/0
>> > ip address 134.1.32.2 255.255.240.0
>> > ip irdp
>> > ip irdp multicast
>> > ip irdp preference 600
Dezhong
>
>> 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 - 08:26:00 GMT-3