From: Matt Wagner (miguknom@xxxxxxxxxxx)
Date: Tue Aug 28 2001 - 02:24:23 GMT-3
If it's good enough for ConfigMaker, it's good enough for me!
(Sorry, that was out of line...)
Matt
----Original Message Follows----
From: jonatale@earthlink.net
Reply-To: jonatale@earthlink.net
To: Denise Donohue <fradendon@home.com>
CC: "'Mike Schlenger'" <mschlenger@n2nsolutions.com>, "'afiddler'"
<afiddler@wi.rr.com>, ccielab@groupstudy.com
Subject: Re: default orignate
Date: Mon, 27 Aug 2001 22:59:39 -0700
I think this is generally considered a hack.
It relies on proxy arp, which is on by default on most routers.
It creates extra broadcast traffic. Also, what if you had three routers on
the
LAN - the router used would be the luck of the draw. I never thought of the
ARP
table size - but that is a good point too.
I have seen people use this becuase they did not know the next hop or (more
likely) they just did not know.
On p2p it's ok.
Denise Donohue wrote:
> You piqued my curiosity, since I've only used this with serial
connections.
> In my tests of this, the router arps for the destination mac address, and
> the router on the other end replies with its address. The first router
then
> adds that ip and mac address mapping to the arp table. So, yes, I guess
> that the table could get full quickly.
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Mike Schlenger
> Sent: Monday, August 27, 2001 1:28 PM
> To: 'afiddler'
> Cc: 'ccielab@groupstudy.com'
> Subject: RE: default orignate
>
> I guess I see why it works but why would it EVER be configured this way?
> Configuring "ip route 0.0.0.0 0.0.0.0 E0/0" is so the router will treat
all
> of the destinations that the router does not know how to reach through
some
> other route(in the routing table) as directly connected to E0/0. So the
> router should send an ARP request for each host that it receives packets
for
> on this network segment? I would think that this would kill a router! The
> arp tables would be huge! Am I off on this? Like I said, I'm probably
making
> this a bigger deal then it really is but if there are good design
strategies
> that I'm not taking advantage of, I WANT TO KNOW!!! If I were a proctor,
and
> my thoughts are somewhat close, I would take points off for bad design :)
>
> Mike
>
> Mike Schlenger
> CCIE #7079
>
> -----Original Message-----
> From: afiddler [mailto:afiddler@wi.rr.com]
> Sent: Thursday, August 23, 2001 10:52 PM
> To: Mike Schlenger
> Subject: Re: default orignate
>
> This is what I have tried in the past:
>
> router eigrp 1
> network 10.0.0.0
> network 11.0.0.0
> network 12.0.0.0
> network 0.0.0.0
> no auto-summary
> eigrp log-neighbor-changes
> !
> ip classless
> ip route 0.0.0.0 0.0.0.0 FastEthernet0
> 1750_L# sh ip route
> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter
> area
> * - candidate default, U - per-user static route, o - ODR
> P - periodic downloaded static route
>
> Gateway of last resort is 0.0.0.0 to network 0.0.0.0
>
> 10.0.0.0/24 is subnetted, 1 subnets
> C 10.0.0.0 is directly connected, Serial0
> 12.0.0.0/24 is subnetted, 1 subnets
> C 12.0.0.0 is directly connected, FastEthernet0
> 13.0.0.0/24 is subnetted, 1 subnets
> D 13.0.0.0 [90/20514560] via 10.0.0.2, 00:04:37, Serial0
> S* 0.0.0.0/0 is directly connected, FastEthernet0
>
> 1750_R#sh ip route
> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter
> area
> * - candidate default, U - per-user static route, o - ODR
> P - periodic downloaded static route
>
> Gateway of last resort is 10.0.0.1 to network 0.0.0.0
>
> 10.0.0.0/24 is subnetted, 1 subnets
> C 10.0.0.0 is directly connected, Serial0
> 11.0.0.0/24 is subnetted, 1 subnets
> C 11.0.0.0 is directly connected, Async5
> 12.0.0.0/24 is subnetted, 1 subnets
> D 12.0.0.0 [90/20514560] via 10.0.0.1, 00:05:05, Serial0
> 13.0.0.0/24 is subnetted, 1 subnets
> C 13.0.0.0 is directly connected, FastEthernet0
> D* 0.0.0.0/0 [90/20514560] via 10.0.0.1, 00:05:05, Serial0
>
> ----- Original Message -----
> From: "Mike Schlenger" <mschlenger@n2nsolutions.com>
> To: "'Denise Donohue'" <fradendon@home.com>; "'Conte, Charles'"
> <Charles.Conte@nasd.com>; <ccielab@groupstudy.com>
> Sent: Thursday, August 23, 2001 4:40 PM
> Subject: RE: default orignate
>
> > Wow...this is very interesting. Obviously there is more then one way to
> skin
> > a cat. I am a bit skeptical of this answer though...can you post your
> > routing table? I'm curious as to how your EIGRP neighbors view this. It
> > looks weird to me. I'm certainly not flaming you on this...it just
perked
> my
> > interest. I'm going to set this up at home later...
> >
> > Mike
> >
> >
> > Mike Schlenger
> > CCIE #7079
> >
> > -----Original Message-----
> > From: Denise Donohue [mailto:fradendon@home.com]
> > Sent: Thursday, August 23, 2001 4:18 PM
> > To: 'Conte, Charles'; ccielab@groupstudy.com
> > Subject: RE: default orignate
> >
> >
> > On the router that you want to sending out the default route, set up a
> > static route of 0.0.0.0 0.0.0.0 <interface>. Send it out the
interface,
> do
> > not put the next hop ip. Then under EIGRP, add the network 0.0.0.0.
> >
> > I was trying to figure that out myself yesterday and got help from a
> friend.
> > So if it's a stupid question, then we both are stupid questioners!
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> > Conte, Charles
> > Sent: Thursday, August 23, 2001 10:37 AM
> > To: 'ccielab@groupstudy.com'
> > Subject: default orignate
> >
> >
> > I have a stupid question. How do you inject a defaut route with eigrp?
> > With OSPF you can use the default originate command but how is this
done
> > with EIGRP. Is it by redistributing a static route into EIGRP or is
there
> a
> > simple command like default originate. Thanks
> >
> > Charles
> > **Please read:http://www.groupstudy.com/list/posting.html
> > **Please read:http://www.groupstudy.com/list/posting.html
> > **Please read:http://www.groupstudy.com/list/posting.html
> **Please read:http://www.groupstudy.com/list/posting.html
> **Please read:http://www.groupstudy.com/list/posting.html
**Please read:http://www.groupstudy.com/list/posting.html
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