From: Rich Collins (nilsi2002@gmail.com)
Date: Wed Jan 14 2009 - 22:02:32 ARST
I got a similar result. That summary address of 0.0.0.0 just drowned
out all the other individual routes.
If you don't want the default route you should see the individual
routes if you remove that summary address and add a route-map to the
redistribute bgp 20
i.e.
route-map LEVEL1
set level level-1
On Wed, Jan 14, 2009 at 6:50 PM, Dr. Seuss <greeneggsandham4@hotmail.com> wrote:
> Well here's what I ended up doing:
>
> router isis
> redistribute bgp 20
> summary-address 0.0.0.0 0.0.0.0 level-1 metric 13 *just some weird-looking
> number to make it stand out
>
> I was sort of surprised by the results. The level-1 routers in the area
> received only a default route, and when I looked in R6's ISIS database, none
> of the individual BGP routes appeared - just the static route.
>
> Here's the ISIS database on R6 when I just redistributed BGP and did nothing
> else:
>
> sho isis database detail
> [snip]
> Router6.00-00 * 0x00000018 0xCBCB 1182 0/0/0 Area
> Address: 49.0002 NLPID: 0x81 0xCC Hostname: Router6 IP Address:
> 6.6.6.6 Metric: 10 IP 35.1.0.0 255.255.255.0 Metric: 10 IP
> 6.6.6.6 255.255.255.255 Metric: 10 IS RouterBB3.02 Metric: 0
> ES Router6 Metric: 33 IP-External 1.1.1.1 255.255.255.255 Metric: 33
> IP-External 2.2.2.2 255.255.255.255 Metric: 33 IP-External 5.5.5.5
> 255.255.255.255 Metric: 33 IP-External 11.0.0.0 255.0.0.0 Metric: 33
> IP-External 46.1.0.0 255.255.255.0 Metric: 33 IP-External 49.1.0.0
> 255.255.255.0
> [snip]
>
> Now here's the R6 ISIS database when I'm redistributing BGP *and* using the
> summary address:
>
> sho isis database detail
>
> Router6.00-00 * 0x00000017 0xA2FF 1015 0/0/0 Area
> Address: 49.0002 NLPID: 0x81 0xCC Hostname: Router6 IP Address:
> 6.6.6.6 Metric: 10 IP 35.1.0.0 255.255.255.0 Metric: 10 IP
> 6.6.6.6 255.255.255.255 Metric: 10 IS RouterBB3.02 Metric: 0
> ES Router6 Metric: 13 IP-External 0.0.0.0 0.0.0.0
>
> So, pretty cool - it doesn't choke the ISIS database with all the BGP routes,
> and informs the router that it's fulfilling the role of an ASBR, so to speak.
>
> Friday will be my *third* attempt at the BSCI...failed it by a hair last time.
> ISIS was one of my weak spots (28%!), so hopefully I can tame this beast now.
>
> Thanks,
>
> BJW> Date: Wed, 14 Jan 2009 15:27:43 -0500> From: nilsi2002@gmail.com> To:
> greeneggsandham4@hotmail.com> Subject: Re: ISIS default routes> CC:
> ccielab@groupstudy.com> > I'm not sure if this is the most elegant method but
> it seems to work.> > Take your step 2)> > On your Router6> > router isis> net
> xx.xxxx> summary-address 0.0.0.0 0.0.0.0 level-1> redistribute static ip
> metric 50 level-1> > > -Rich> > > > On Wed, Jan 14, 2009 at 9:01 AM, Dr. Seuss
> <greeneggsandham4@hotmail.com> wrote:> > I've been playing around with default
> routes in ISIS the last couple of days,> > and I've searched through the
> archives for more info. My topology is simple:> > Router6 is a L1/L2 router
> with an ethernet connection to Router8, and a> > frame-relay connection to
> Router2. R6 and R2 speak BGP with each other, and> > R6 speaks ISIS with R8.
> I'm trying to get R6 to feed a default route to R8> > (redistributing BGP into
> ISIS is a bad idea), and here's what I've discovered> > so far:> >> > 1) R6
> does *not* automatically set the ATT bit in its LSP updates to R8,> > despite
> R6 being L1/L2 and R8 being L1.> >> > 2) Configuring a static route to null0
> on the L1/L2 router and redistributing> > static does not work. L1 routers
> (R8) do not receive a default route.> >> > 3) Configuring a static route to
> null0 on the L1/L2 router and using> > "default-information originate" does
> not work. L1 routers do not receive a> > default route.> >> > 4) Configuring
> ISIS between R6 and R2 *does* impel R6 to send a default route> > to R8. This
> is the *only* configuration so far which gets a default route> > into R8's
> routing table.> >> > For the record, R8 is running 12.1(3r)T2, and R6 is
> running Version 12.2(8r).> > My question is this: what is the ISIS equivalent
> of an ASBR? It doesn't seem> > to want to feed a default route to anyone else
> unless it's attached to another> > *ISIS* area!> >> > Thanks,> > BJW> >> >
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