From: Jaeheon Yoo (kghost@xxxxxxxxxxxx)
Date: Fri Mar 15 2002 - 20:40:57 GMT-3
Hi, Tshon
This is a typical hub and spoke situation.
I believe there's no problem with 2 frame map statements on spoke routers(R2, R
3)
Without the second frame map statement for the other spoke router, there's no i
p reachability between the two spoke routers. (I think that "broadcast" keyword
for the other spoke router is useless here)
The problem is with next-hop reachability, I guess.
>From the OSPF configuration on each spoke router, we can infer that there's no
routing information about 'DMZs' on R1(hub), where OSPF is the only IGP.
152.1.11.0/30, 152.1.12.0/30, 152.1.12.8/30
There're two solutions here.
1. apply next-hop-self statement to a neighbor for the hub on each spoke router
.
R2:
router bgp 100
no synchronization
neighbor 152.1.10.9 remote-as 100
neighbor 152.1.10.9 next-hop-self
R3:
router bgp 100
no synchronization
neighbor 152.1.10.9 remote-as 100
neighbor 152.1.10.9 next-hop-self
2. include DMZs or 'redistribute connected subnets' in OSPF routing process on
each spoke router.
http://www.cisco.com/warp/public/459/25.shtml
Internet Routing Architect, 2nd E., pp.174-175
Hope this helps,
Jaeheon
----- Original Message -----
From: "Tshon" <tshon@netzero.net>
To: "Bruce Williams" <bruce@williamsnetworking.com>
Cc: <sandyccie@yahoo.com>; "Ccielab@Groupstudy. Com" <ccielab@groupstudy.com>
Sent: Saturday, March 16, 2002 7:49 AM
Subject: Re: BGP Route Reflector Problem
> Remove the other frame map statements, your router is looking for the
> device locally on the network and it is not, due to NBMA.
> all you need on R2 & R3 is one frame map statement to R1.
> then you need to apply the neighbor next-hop-self command to both
> neighbors on R1.
>
> Bruce Williams wrote:
>
> >Here is the Route Reflector Config:
> >
> >Trying r1 (192.168.1.5, 2001)... Open
> >
> >R1#sh run
> >Building configuration...
> >
> >Current configuration:
> >!
> >version 12.0
> >service timestamps debug uptime
> >service timestamps log uptime
> >no service password-encryption
> >!
> >hostname R1
> >!
> >no logging console
> >!
> >ip subnet-zero
> >no ip domain-lookup
> >!
> >!
> >!
> >interface Loopback0
> > ip address 152.1.10.1 255.255.255.255
> > no ip directed-broadcast
> > ip ospf interface-retry 0
> >!
> >interface Ethernet0
> > ip address 152.1.8.1 255.255.255.192
> > no ip directed-broadcast
> > ip ospf cost 65
> > ip ospf interface-retry 0
> > ip ospf hello-interval 120
> > ip ospf priority 10
> >!
> >interface Ethernet1
> > ip address 152.1.9.1 255.255.255.128
> > no ip directed-broadcast
> > ip ospf interface-retry 0
> > ip ospf priority 0
> >!
> >interface Serial0
> > no ip address
> > no ip directed-broadcast
> > encapsulation frame-relay
> > no ip mroute-cache
> >!
> >interface Serial0.1 multipoint
> > ip address 152.1.10.9 255.255.255.248
> > no ip directed-broadcast
> > ip ospf network non-broadcast
> > ip ospf interface-retry 0
> > ip ospf hello-interval 120
> > frame-relay interface-dlci 100
> > frame-relay interface-dlci 200
> >!
> >interface Serial1
> > no ip address
> > no ip directed-broadcast
> > shutdown
> >!
> >router ospf 1
> > passive-interface Loopback0
> > network 152.1.8.0 0.0.0.127 area 1
> > network 152.1.9.0 0.0.0.127 area 2
> > network 152.1.10.1 0.0.0.0 area 0
> > network 152.1.10.8 0.0.0.7 area 0
> > neighbor 152.1.10.11
> > neighbor 152.1.10.10
> >!
> >router bgp 100
> > no synchronization
> > neighbor 152.1.10.10 remote-as 100
> > neighbor 152.1.10.10 route-reflector-client
> > neighbor 152.1.10.11 remote-as 100
> > neighbor 152.1.10.11 route-reflector-client
> >!
> >ip classless
> >!
> >!
> >line con 0
> > exec-timeout 0 0
> > transport input none
> >line aux 0
> >line vty 0 4
> > login
> >!
> >end
> >
> >Here is one client:
> >
> >R3#sh run
> >Building configuration...
> >
> >Current configuration:
> >!
> >version 12.0
> >service timestamps debug uptime
> >service timestamps log uptime
> >no service password-encryption
> >!
> >hostname R3
> >!
> >no logging console
> >!
> >ip subnet-zero
> >no ip domain-lookup
> >!
> >!
> >!
> >!
> >!
> >!
> >!
> >interface Loopback0
> > ip address 152.1.10.3 255.255.255.255
> > no ip directed-broadcast
> > ip ospf interface-retry 0
> >!
> >interface BRI0/0
> > no ip address
> > no ip directed-broadcast
> > shutdown
> >!
> >interface Ethernet0/0
> > ip address 152.1.8.62 255.255.255.192
> > no ip directed-broadcast
> > ip ospf interface-retry 0
> > ip ospf hello-interval 120
> > ip ospf priority 0
> >!
> >interface Ethernet0/1
> > no ip address
> > no ip directed-broadcast
> > shutdown
> >!
> >interface Serial1/0
> > ip address 152.1.10.11 255.255.255.248
> > no ip directed-broadcast
> > encapsulation frame-relay
> > ip ospf interface-retry 0
> > ip ospf hello-interval 120
> > ip ospf priority 0
> > no ip mroute-cache
> > no fair-queue
> > frame-relay map ip 152.1.10.9 200 broadcast
> > frame-relay map ip 152.1.10.10 200 broadcast
> > no frame-relay inverse-arp
> >!
> >interface Serial1/1
> > ip address 152.1.12.9 255.255.255.252
> > no ip directed-broadcast
> > clockrate 63960
> >!
> >interface Serial1/2
> > ip address 152.1.12.1 255.255.255.252
> > no ip directed-broadcast
> > clockrate 63960
> >!
> >interface Serial1/3
> > ip address 152.1.20.1 255.255.255.252
> > no ip directed-broadcast
> > clockrate 63960
> >!
> >router eigrp 1
> > redistribute ospf 1 metric 10000 10 255 1 1500
> > passive-interface Ethernet0/0
> > passive-interface Serial1/0
> > passive-interface Serial1/1
> > passive-interface Serial1/2
> > network 152.1.0.0
> > distribute-list 7 out Serial1/3
> >!
> >router ospf 1
> > passive-interface Loopback0
> > network 152.1.8.0 0.0.0.127 area 1
> > network 152.1.10.3 0.0.0.0 area 0
> > network 152.1.10.8 0.0.0.7 area 0
> >!
> >router bgp 100
> > no synchronization
> > neighbor 152.1.10.9 remote-as 100
> > neighbor 152.1.12.2 remote-as 200
> > neighbor 152.1.12.2 distribute-list 1 out
> > neighbor 152.1.12.10 remote-as 200
> > neighbor 152.1.12.10 distribute-list 1 out
> >!
> >ip classless
> >!
> >access-list 1 deny 0.0.0.0
> >access-list 2 permit any
> >access-list 7 deny 152.1.20.16 0.0.0.15
> >access-list 7 permit any
> >!
> >!
> >line con 0
> > exec-timeout 0 0
> > transport input none
> >line aux 0
> >line vty 0 4
> > login
> >!
> >end
> >
> >Here is the other client:
> >
> >R2#sh run
> >Building configuration...
> >
> >Current configuration:
> >!
> >version 12.0
> >service timestamps debug uptime
> >service timestamps log uptime
> >no service password-encryption
> >!
> >hostname R2
> >!
> >no logging console
> >!
> >ip subnet-zero
> >no ip domain-lookup
> >!
> >!
> >!
> >interface Loopback0
> > ip address 152.1.10.2 255.255.255.255
> > no ip directed-broadcast
> > ip ospf interface-retry 0
> >!
> >interface Ethernet0
> > ip address 152.1.9.126 255.255.255.128
> > no ip directed-broadcast
> > ip ospf interface-retry 0
> >!
> >interface Serial0
> > ip address 152.1.10.10 255.255.255.248
> > no ip directed-broadcast
> > encapsulation frame-relay
> > ip ospf interface-retry 0
> > ip ospf hello-interval 120
> > ip ospf priority 0
> > no ip mroute-cache
> > no fair-queue
> > frame-relay map ip 152.1.10.9 100 broadcast
> > frame-relay map ip 152.1.10.11 100 broadcast
> > no frame-relay inverse-arp
> >!
> >interface Serial1
> > ip address 152.1.11.1 255.255.255.252
> > no ip directed-broadcast
> > clockrate 64000
> >!
> >router ospf 1
> > passive-interface Loopback0
> > network 152.1.9.0 0.0.0.127 area 2
> > network 152.1.10.2 0.0.0.0 area 0
> > network 152.1.10.8 0.0.0.7 area 0
> >!
> >router bgp 100
> > no synchronization
> > network 152.1.9.0 mask 255.255.255.128
> > neighbor 152.1.10.9 remote-as 100
> > neighbor 152.1.11.2 remote-as 300
> > neighbor 152.1.11.2 route-map localonly in
> >!
> >ip classless
> >ip as-path access-list 1 permit ^300$
> >ip ospf name-lookup
> >!
> >route-map localonly permit 10
> > match as-path 1
> >!
> >!
> >line con 0
> > exec-timeout 0 0
> > transport input none
> >line aux 0
> >line vty 0 4
> > login
> >!
> >end
> >
> >Please email me if you see why the Route Reflector is not reflection routes
> >to either client. It is receiving routes from both, but it is not sending
> >them along to the other client.
> >
> >Thanks,
> >
> >Bruce
> >mailto:bruce@williamsnetworking.com
> >
> >
> >-----Original Message-----
> >From: Sandro Ciffali [mailto:sandyccie@yahoo.com]
> >Sent: Friday, March 15, 2002 2:47 PM
> >To: Bruce Williams; Bruce. Lawrence. Williams@Verizon. Com;
> >ccielab@groupstudy.com
> >Subject: Re: BGP Route Reflector Problem
> >
> >
> >could u post entire configs??
> >
> >sandro
> >--- Bruce Williams <bruce@williamsnetworking.com>
> >wrote:
> >
> >>I am having a problem with Lab 2 in the "CCIE Lab
> >>Practice Kit" by Hutnik
> >>and Satterlee. I have three IBGP routers that have
> >>connectivity through a
> >>frame cloud:
> >>
> >>152.1.10.9 is the Route Refletor
> >>152..1.10.10 and 152.1.10.11 are the clients. When I
> >>do a show ip bgp
> >>neighbors" on the route reflector the other two
> >>routers are established as
> >>route reflector clients, but for some reason the
> >>route reflector is not
> >>reflecting routes from one client to the other.
> >>Please check out these brief
> >>configs of the three routers and tell me if I am
> >>missing something.
> >>
> >>Here is the BGP config of the route reflector:
> >>
> >>router bgp 100
> >> no synchronization
> >> network 152.1.9.0 mask 255.255.255.128
> >> neighbor 152.1.10.10 remote-as 100
> >> neighbor 152.1.10.10 route-reflector-client
> >> neighbor 152.1.10.11 remote-as 100
> >> neighbor 152.1.10.11 route-reflector-client
> >>
> >>Here is the config for the two route-reflector
> >>clients:
> >>
> >>router bgp 100
> >> no synchronization
> >> neighbor 152.1.10.9 remote-as 100
> >> neighbor 152.1.12.2 remote-as 200
> >> neighbor 152.1.12.2 distribute-list 1 out
> >> neighbor 152.1.12.10 remote-as 200
> >> neighbor 152.1.12.10 distribute-list 1 out
> >>
> >>router bgp 100
> >> no synchronization
> >> network 152.1.9.0 mask 255.255.255.128
> >> neighbor 152.1.10.9 remote-as 100
> >> neighbor 152.1.11.2 remote-as 300
> >> neighbor 152.1.11.2 route-map localonly in
> >>
> >>Bruce Williams
> >>
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