From: Gary Bradford (glbradford@xxxxxxxxxxx)
Date: Tue Jan 11 2000 - 18:28:45 GMT-3
The summary address generates the static route to Null. The only reason for
the route to NULL is to allow the router to use the longest match rule to
process all known routes and to efficiently drop packets going to unknown
addresses within the summary.
>From: jaime.salazar@equant.com
>Reply-To: jaime.salazar@equant.com
>To: "Stanislav Sinyagin" <SSinyagin@mtu.ru>
>CC: "Darrel E. Hinshaw" <dhinshaw@istrength.net>, "CCIE List
>(E-mail)" <ccielab@groupstudy.com>
>Subject: Re: VLSM ---> FLSM or OSPF --> IGRP
>Date: Tue, 11 Jan 2000 11:13:45 -0600
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>
>
>Stan,
>
>You are right, summary-address command must be used in ASBR rather than
>area
>range that is used in ABR. Configure Summary-address in the router with
>ospf and
>igrp, additional to this you must type a static route to null0. After you
>do
>this you will see it working. I just did it on my own lab and it works just
>fine.
>
>Jaime
>
>
>
>
>"Stanislav Sinyagin" <SSinyagin@mtu.ru> on 11/01/2000 03:52:39 AM
>
>Please respond to "Stanislav Sinyagin" <SSinyagin@mtu.ru>
>
>To: "Darrel E. Hinshaw" <dhinshaw@istrength.net>, "CCIE List (E-mail)"
> <ccielab@groupstudy.com>
>cc: (bcc: Jaime Salazar/Mexico/AMERICAS/Equant)
>
>Subject: Re: VLSM ---> FLSM or OSPF --> IGRP
>
>
>
>Guys, I suspect you're both wrong.
>
>Read the OSPF commands from CiscoCD:
>
>"area range" is useful only on ABR routers, to tell the other area
>that my area can be summarized this way. You don't have any ABR,
>so get this command away.
>
>"summary-address" is used on ASBR only, and it tells the router to
>inject into OSPF aggregared route, instead of many small ones.
>You don't have any problem in redistributing INTO OSPF, so
>get this off too.
>
>I didn't yet invent the solution, but I'm 100% sure these two commands
>won't ever help (and they don't, as I see in the routing tables 8^)
>
>
>Good luck,
> Stan
>
>
>
>
>
>----- Original Message -----
>From: Darrel E. Hinshaw <dhinshaw@istrength.net>
>To: CCIE List (E-mail) <ccielab@groupstudy.com>
>Sent: Monday, January 10, 2000 18:19
>Subject: RE: VLSM ---> FLSM or OSPF --> IGRP
>
>
> > Everyone,
> >
> > Sorry for responding to this but I have a beef. Could everyone please
>read
> > and ReRead an e-mail before you decide to reply to it. As you can see
>from
> > the gentleman's response below (I do Appreciate the response but just
>wish
> > that it had been appropriate) he provided valid correct information but
>if
> > he had read my original e-mail he would have seen the summary-address
> > command that he referred to and could have perhaps shed more useful
>light on
> > the issue.
> >
> >
> > This is not meant to bruise anybody's feeling but rather this should be
> > taken as constructive criticism that will allow this list to become more
> > productive for all of us.
> >
> >
> >
> > ***** RESPONSE ******
> >
> >
> > Summarise all routes to /24 at area boundaries.Since major class is same
>and
> > mask is same all routes shoud go in to IGRP.U can use summary-address
>also
> > for this purpose.
> >
> >
> > ***** ORIGINAL *****
> >
> >
> > All:
> >
> >
> > First I'm sorry for making this so long.
> >
> >
> >
> > Great deal of difficulty here. The usual parameter of NO static routes
>of
> > any kind are in effect.
> >
> >
> > R1-->S0------(OSPF 0)------S0<--R2-->E0------(IGRP)------E0<--R3-->E1
> >
> > Interface Addresses:
> > R1/S0: 150.100.4.5/24 OSPF Area 0
> > R1/L0: 150.100.5.5/30 OSPF Area 0
> > R2/S0: 150.100.4.3/24 OSPF Area 0
> > R2/L0: 150.100.5.9/30 OSPF Area 0
> > R2/E0: 150.100.128.1/24 IGRP
> > R3/E0: 150.100.128.2/24 IGRP
> > R3/E1: 150.100.129.1/24 IGRP
> >
> > Problem: How do I distribute OSPF into IGRP on R2? I have configured but
>I
> > am unable to get any 150.100.5.x addresses to show up in R3's routing
>table.
> > Below are the relevant Configs.
> >
> > Router 1:
> >
> > router ospf 5
> > network 150.100.4.0 0.0.0.255 area 0
> > network 150.100.5.5 0.0.0.0 area 0
> > network 150.100.14.0 0.0.0.255 area 3
> > area 0 authentication message-digest
> > area 3 range 150.100.14.0 255.255.255.0
> > area 3 virtual-link 150.100.3.1
> >
> > Router 2:
> >
> > router ospf 5
> > summary-address 150.100.5.0 255.255.255.0
> > redistribute igrp 5 subnets route-map igrpn2ospf
> > network 150.100.4.0 0.0.0.255 area 0
> > network 150.100.5.9 0.0.0.0 area 0
> > area 0 authentication message-digest
> > area 0 range 150.100.4.0 255.255.255.0
> > area 0 range 150.100.5.0 255.255.255.0
> >
> > router igrp 5
> > redistribute ospf 5 metric 10000 10 255 1 1500 route-map ospfn2igrp
> > passive-interface Loopback0
> > passive-interface Serial0
> > passive-interface Serial0.110
> > network 150.100.0.0
> > network 0.0.0.0
> >
> > ip classless
> >
> > access-list 1 permit 150.100.128.0 0.0.127.255
> > access-list 2 deny 150.100.128.0 0.0.127.255
> > access-list 2 permit any
> > !
> > route-map igrpn2ospf permit 10
> > match ip address 1
> > !
> > route-map ospfn2igrp permit 10
> > match ip address 2
> >
> > Router 3:
> >
> > router igrp 5
> > network 150.100.0.0
> >
> > ip classless
> >
> >
> >
> > ANY help would be appreciated.
> >
> >
> > Regards,
> >
> > Darrel Hinshaw
> >
> >
> >
> > PS If you have actually read this far . . . THANKS.
> >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:22:44 GMT-3