From: Ya Wen (ywen@xxxxxxxxxxxxxxxxxxxxxx)
Date: Tue Feb 20 2001 - 05:52:50 GMT-3
I think it's because OSPF treats point-to-multipoint network as a
collection of point-to-point networks. When advertising LSA,
point-to-point networks are treated as stub networks, that's why the host
routes showed up. If you use broadcast or non-broadcast network types, you
will see those host routes will disappear...
-Ya
On Mon, 19 Feb 2001, Chuck Larrieu wrote:
> I'm not so sure that the way the particular interface is placed into the
> OSPF process is the reason for the host routes appearing. I can't place my
> finger on it at this moment. My quick search of the RFC did not yield what I
> thought I remembered. But I believe that the result Mr. Sanjay is seeing has
> to do with the way OSPF treats OSPF point-to-multipoint network types on a
> frame relay subinterface.
>
> Not quite sure.
>
> Chuck
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> sanjay
> Sent: Monday, February 19, 2001 4:35 PM
> To: Bolcer, Matt; ccielab@groupstudy.com
> Subject: Re: ospf host routes showing up
>
> Try changing the wild card mask for area 0 to 0.0.0.7.
> ----- Original Message -----
> From: "Bolcer, Matt" <matt.bolcer@eds.com>
> To: <ccielab@groupstudy.com>
> Sent: Friday, February 16, 2001 12:25 PM
> Subject: ospf host routes showing up
>
>
> > Why are host routes showing up for the frame-relay connected neighbors,
> and
> > being passed as a host (/32) route to the next-hop eigrp (R1) route table?
> >
> > interface Serial0
> > ip address 1.1.1.1 255.255.255.0
> > no fair-queue
> > clockrate 125000
> > !
> > interface Serial1
> > no ip address
> > encapsulation frame-relay
> > frame-relay lmi-type ansi
> > !
> > interface Serial1.1 multipoint
> > ip address 137.144.1.100 255.255.255.248
> > ip ospf network point-to-multipoint
> > frame-relay interface-dlci 401
> > frame-relay interface-dlci 403
> > !
> > interface Serial1.2 multipoint
> > ip address 137.144.1.67 255.255.255.248
> > ip ospf network broadcast
> > frame-relay interface-dlci 402
> > !
> > router eigrp 100
> > redistribute ospf 100 metric 1500 100 255 1 1500
> > network 1.0.0.0
> > !
> > router ospf 100
> > network 137.144.1.100 0.0.0.0 area 0
> > network 137.144.1.67 0.0.0.0 area 0
> > !
> > router bgp 65010
> > neighbor 1.1.1.2 remote-as 64710
> > no auto-summary
> > !
> > ip classless
> > logging buffered
> > !
> >
> > r4#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
> > 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, * - candidate
> > default
> > U - per-user static route
> >
> > Gateway of last resort is not set
> >
> > 1.0.0.0/24 is subnetted, 1 subnets
> > C 1.1.1.0 is directly connected, Serial0
> > 11.0.0.0/16 is subnetted, 1 subnets
> > O IA 11.11.0.0 [110/65] via 137.144.1.66, 00:14:51, Serial1.2
> > 137.144.0.0/16 is variably subnetted, 5 subnets, 2 masks
> > O IA 137.144.1.33/32 [110/65] via 137.144.1.97, 00:14:51, Serial1.1
> > C 137.144.1.64/29 is directly connected, Serial1.2
> > C 137.144.1.96/29 is directly connected, Serial1.1
> > O 137.144.1.97/32 [110/64] via 137.144.1.97, 00:14:52, Serial1.1
> > O 137.144.1.98/32 [110/64] via 137.144.1.98, 00:14:52, Serial1.1
> > r4#
> >
> >
> > r1#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
> > 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, * - candidate
> > default
> > U - per-user static route
> >
> > Gateway of last resort is not set
> >
> > 1.0.0.0/24 is subnetted, 1 subnets
> > C 1.1.1.0 is directly connected, Serial0
> > 11.0.0.0/16 is subnetted, 1 subnets
> > D EX 11.11.0.0 [170/2244096] via 1.1.1.1, 00:19:46, Serial0
> > 137.144.0.0/32 is subnetted, 3 subnets
> > D EX 137.144.1.33 [170/2244096] via 1.1.1.1, 00:19:46, Serial0
> > D EX 137.144.1.97 [170/2244096] via 1.1.1.1, 00:19:46, Serial0
> > D EX 137.144.1.98 [170/2244096] via 1.1.1.1, 00:19:46, Serial0
> >
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