From: Joe Chang (changjoe@earthlink.net)
Date: Thu Sep 25 2003 - 01:40:26 GMT-3
Besides being a routing protocol, ISIS is also a layer-2 protocol. ISIS
protocol packets are link-level, not encapsulated in IP.
----- Original Message -----
From: "A Paradela" <aparadela@earthlink.net>
To: "'Joe Chang'" <changjoe@earthlink.net>; <ccielab@groupstudy.com>
Sent: Wednesday, September 24, 2003 6:13 PM
Subject: RE: ISIS: default route to L1 routers
> It works now, but other than removing any CLNS routing commands I'm not
sure
> why. I did not have to change r2 to L2 at the routing process. Also when
I
> cleared the isis configs and pasted them back, the
"never-set-attached-bit"
> (sounds like ATT to me..) cmd that appeared on the config went away, not
> sure why it was there to begin with.
>
> q: Why do we need to map CLNS under frame-relay? Is it using CLNS
instead
> of IP at L3?
> When is there a need to run CLNS routing?
>
> Thanks for your help, AP
>
> !r6 (removed CLNS routing cmds)
> interface Ethernet0
> ip address 133.9.50.5 255.255.255.0
> ip router isis
> isis circuit-type level-1
> router isis
> net 65.1111.6666.6666.6666.00
> passive-interface Loopback0
> is-type level-1
>
> !r5 (removed CLNS routing cmds)
> interface Ethernet0
> ip address 133.9.50.1 255.255.255.0
> ip router isis
> isis circuit-type level-1
> interface Serial1
> ip address 133.9.101.2 255.255.255.0
> ip router isis
> encapsulation frame-relay
> frame-relay map clns 502 broadcast
> frame-relay map ip 133.9.101.1 502 broadcast
> frame-relay map ip 133.9.101.2 502
> frame-relay map ip 133.9.101.5 502 broadcast
> no frame-relay inverse-arp
> isis circuit-type level-2-only
> router isis
> net 65.1111.5555.5555.5555.00
> passive-interface Loopback0
> default-information originate
>
> !r2 (removed CLNS routing cmds)
> interface Serial1.256 multipoint
> ip address 133.9.101.1 255.255.255.0
> ip router isis
> frame-relay map clns 205 broadcast
> frame-relay map ip 133.9.101.1 205
> frame-relay map ip 133.9.101.2 205 broadcast
> frame-relay map ip 133.9.101.5 206 broadcast
> isis circuit-type level-2-only
> router isis
> net 02.1111.2222.2222.2222.00
> passive-interface Loopback0
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Joe Chang
> Sent: Wednesday, September 24, 2003 9:24 PM
> To: ccielab@groupstudy.com
> Subject: Re: ISIS: default route to L1 routers
>
>
> Doesn't an L1 router install a default route pointing to the nearest L1-L2
> router? Perhaps if "is type level-1" was removed from R6's router-level
> config.
>
> ----- Original Message -----
> From: "William Lijewski" <ccie8642@hotmail.com>
> To: <aparadela@earthlink.net>; <ccielab@groupstudy.com>
> Sent: Wednesday, September 24, 2003 2:40 PM
> Subject: Re: ISIS: default route to L1 routers
>
>
> > For the default route to show up on R6 there is no need for the default
> > information originate command. You need to make R2 strictly level 2 by
> > changing its level under the router process instead of the interface.
> Once
> > you do that the default route should be injected automatically into R6.
> >
> > Also the CLNS routing is not needed, you are doing IP routing, not CLNS
> > routing. It doesn't need to be turned on in global config, or be under
> any
> > of the interfaces.
> >
> > Bill Lijewski
> > CCIE #8642
> > Network Learning Inc
> > 5 Day R&S CCIE Bootcamp Instructor
> >
> >
> >
> > >From: A Paradela <aparadela@earthlink.net>
> > >Reply-To: A Paradela <aparadela@earthlink.net>
> > >To: ccielab@groupstudy.com
> > >Subject: ISIS: default route to L1 routers
> > >Date: Wed, 24 Sep 2003 17:17:49 -0400 (GMT-04:00)
> > >
> > >Not able to make this work. Any thoughts / hints appreciated.
> > >
> > >R2 -- (L2) -- R5 -- (L1) -- R6
> > >
> > >R2 advertising 133.9.2.0/24 and 133.8.0.0/16 (summary)
> > >R5 advertising 133.9.5.0/24
> > >R6 advertising 133.9.6.0/24
> > >
> > >Should R6's routing table should have a 0.0.0.0/0 route to R5? It does
> > >not.
> > >CLNS routing enabled on all interfaces, all adjacencies are up.
> > >R2 and R5 sharing all routes just fine.
> > >From "sh isis database" R2's L1 ATT bit to self is set, no other ATT
bits
> > >are set (would expect one on R5)
> > >
> > >R6 only sees an L1 route from R5 (loopback0)
> > >
> > >Also tried default-information-originate on R5 (is it necessary??) but
> only
> > >R2 sees it, not R6.
> > >How can the 0.0.0.0/0 route be made to only advertise to L1 peers?
> > >
> > >Running 12.2.16b.
> > >
> > >Thanks, AP
> > >
> > >!R6
> > >clns routing
> > >interface Ethernet0
> > > ip address 133.9.50.5 255.255.255.0
> > > ip router isis
> > > clns router isis
> > > isis circuit-type level-1
> > >router isis
> > > net 65.1111.6666.6666.6666.00
> > > passive-interface Loopback0
> > > is-type level-1
> > >
> > > 133.9.0.0/24 is subnetted, 4 subnets
> > >i L1 133.9.5.0 [115/10] via 133.9.50.1, Ethernet0
> > >
> > >!R5
> > >clns routing
> > >interface Ethernet0
> > > ip address 133.9.50.1 255.255.255.0
> > > ip router isis
> > > clns router isis
> > > isis circuit-type level-1
> > >interface Serial1
> > > ip address 133.9.101.2 255.255.255.0
> > > ip router isis
> > > encapsulation frame-relay
> > > no fair-queue
> > > frame-relay map clns 502 broadcast
> > > frame-relay map ip 133.9.101.1 502 broadcast
> > > frame-relay map ip 133.9.101.2 502
> > > frame-relay map ip 133.9.101.5 502 broadcast
> > > no frame-relay inverse-arp
> > > clns router isis
> > > isis circuit-type level-2-only
> > >router isis
> > > net 65.1111.5555.5555.5555.00
> > > passive-interface Loopback0
> > > default-information originate
> > > never-set-attached-bit <<-- ?? not sure where this came
from,
> > >can't find documentation on it...
> > >
> > >i L2 133.8.0.0/16 [115/20] via 133.9.101.1, Serial1
> > > 133.9.0.0/24 is subnetted, 5 subnets
> > >i L1 133.9.6.0 [115/10] via 133.9.50.5, Ethernet0
> > >i L2 133.9.2.0 [115/10] via 133.9.101.1, Serial1
> > >
> > >IS-IS Level-1 Link State Database:
> > >LSPID LSP Seq Num LSP Checksum LSP Holdtime
> ATT/P/OL
> > >5555.5555.5555.00-00* 0x0000000D 0x12D1 1026
0/0/0
> > > Area Address: 65.1111
> > > NLPID: 0x81 0xCC
> > > IP Address: 133.9.5.5
> > > Metric: 10 IP 133.9.50.0 255.255.255.0
> > > Metric: 0 IP 133.9.5.0 255.255.255.0
> > > Metric: 10 IS 6666.6666.6666.01
> > > Metric: 0 ES 5555.5555.5555
> > >6666.6666.6666.00-00 0x0000000C 0xBF57 1024
0/0/0
> > > Area Address: 65.1111
> > > NLPID: 0x81 0xCC
> > > IP Address: 133.9.6.6
> > > Metric: 10 IP 133.9.50.0 255.255.255.0
> > > Metric: 0 IP 133.9.6.0 255.255.255.0
> > > Metric: 10 IS 6666.6666.6666.01
> > > Metric: 0 ES 6666.6666.6666
> > >6666.6666.6666.01-00 0x00000005 0xB5D1 1023
0/0/0
> > > Metric: 0 IS 6666.6666.6666.00
> > > Metric: 0 IS 5555.5555.5555.00
> > >IS-IS Level-2 Link State Database:
> > >LSPID LSP Seq Num LSP Checksum LSP Holdtime
> ATT/P/OL
> > >2222.2222.2222.00-00 0x00000011 0x4B4E 1003
0/0/0
> > > Area Address: 02.1111
> > > NLPID: 0x81 0xCC
> > > IP Address: 133.9.2.2
> > > Metric: 10 IP 133.9.101.0 255.255.255.0
> > > Metric: 10 IS 5555.5555.5555.03
> > > Metric: 0 IP 133.9.2.0 255.255.255.0
> > > Metric: 10 IP 133.8.0.0 255.255.0.0
> > >5555.5555.5555.00-00* 0x0000000C 0x34DD 1025
0/0/0
> > > Area Address: 65.1111
> > > NLPID: 0x81 0xCC
> > > IP Address: 133.9.5.5
> > > Metric: 10 IP 133.9.101.0 255.255.255.0
> > > Metric: 10 IS 5555.5555.5555.03
> > > Metric: 0 IP 0.0.0.0 0.0.0.0
> > > Metric: 0 IP 133.9.5.0 255.255.255.0
> > > Metric: 10 IP 133.9.6.0 255.255.255.0
> > > Metric: 10 IP 133.9.50.0 255.255.255.0
> > >5555.5555.5555.03-00* 0x00000005 0xD239 519
0/0/0
> > > Metric: 0 IS 5555.5555.5555.00
> > > Metric: 0 IS 2222.2222.2222.00
> > >
> > >!R2
> > >interface Serial1
> > > no ip address
> > > encapsulation frame-relay
> > > no fair-queue
> > > clockrate 2000000
> > > no frame-relay inverse-arp
> > >interface Serial1.256 multipoint
> > > ip address 133.9.101.1 255.255.255.0
> > > ip router isis
> > > frame-relay map clns 205 broadcast
> > > frame-relay map ip 133.9.101.1 205
> > > frame-relay map ip 133.9.101.2 205 broadcast
> > > frame-relay map ip 133.9.101.5 206 broadcast
> > > clns router isis
> > > isis circuit-type level-2-only
> > >router isis
> > > net 02.1111.2222.2222.2222.00
> > > passive-interface Loopback0
> > >
> > > 133.8.0.0/16 is variably subnetted, 2 subnets, 2 masks
> > >i su 133.8.0.0/16 [115/10] via 0.0.0.0, Null0
> > > 133.9.0.0/16 is variably subnetted, 7 subnets, 2 masks
> > >i L2 133.9.5.0/24 [115/10] via 133.9.101.2, Serial1.256
> > >i L2 133.9.6.0/24 [115/20] via 133.9.101.2, Serial1.256
> > >i L2 133.9.50.0/24 [115/20] via 133.9.101.2, Serial1.256
> > >i*L2 0.0.0.0/0 [115/10] via 133.9.101.2, Serial1.256
> > >
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