From: Nigel Taylor (nigel_taylor@xxxxxxxxxxx)
Date: Sun Apr 15 2001 - 12:54:40 GMT-3
Corey,
Just glancing over the configs... I've got a few questions..
1. I'm guessing there is a routing to and from R5 to R4.
I see R6 has a bgp connection to R5 so how come R4 isn't working. Well R5
and R6 are in the
same BGP AS 6000, whereas R4 is in the 6001 AS. the "update-source"command
is typically
only used to peer IBGP connections, like with the R5 & R6 connection. Since
you're making an E-BGP connection to R4 from R5 and vise-versa, you should
use the ebgp-multihop command if you want to use the
loopback as the end point.
As a side note, a typical E-BGP connection would be to connect using the
serial interface on the frame connection.
Another thing I noticed was the use of this command for redistributing the
ospf routes into rip.. Why use this command...?
redistribute ospf 1 metric 3 match internal external 1 external 2
The options used here is used for redistribution into BGP because by default
only OPSF internal routes are distributed into BGP, hence using the external
1 & 2. The options are defaults into other IGP's.
HTH
Nigel..
----- Original Message -----
From: Corey M. Ellis <coreye@odigo.com>
To: CCIE Mailist <ccielab@groupstudy.com>
Sent: Sunday, April 15, 2001 11:20 AM
Subject: RE: BGP trick scenario "Not working" Posted Configs
> Hi I am posting the relevant portion of the configs for further
information.
>
> ### R2 ### AS2 router
>
> interface Serial0
> ip address 172.16.26.2 255.255.255.0
> no fair-queue
> clockrate 2000000
> !
> interface Serial1
> ip address 11.11.11.2 255.255.255.0
> clockrate 2000000
> !
> router bgp 2
> neighbor 11.11.11.1 remote-as 1
> neighbor 172.16.26.6 remote-as 1
> no auto-summary
>
> r2#sh ip bgp sum
> BGP table version is 4, main routing table version 4
>
> Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
> State/PfxRcd
> 11.11.11.1 4 1 693 693 4 0 0 11:30:25
0
> 172.16.26.6 4 1 699 699 4 0 0 00:44:02
0
>
> ### R6 #### AS1 and connects to R2 via EBGP on serial0 (confed 6000)
>
> Current configuration:
> !
> version 12.1
> service timestamps debug uptime
> service timestamps log uptime
> no service password-encryption
> !
> hostname r6
> !
> !
> username r5 password 0 ciscoip
> !
> !
> !
> !
> ip subnet-zero
> no ip domain-lookup
> !
> isdn switch-type basic-ni
> cns event-service server
> !
> !
> !
> !
> !
> interface Loopback0
> ip address 140.10.1.1 255.255.255.0
> !
> interface Loopback1
> ip address 172.16.161.1 255.255.255.252
> !
> interface Loopback2
> ip address 172.16.161.5 255.255.255.252
> !
> interface Loopback3
> ip address 172.16.161.9 255.255.255.252
> !
> interface Loopback4
> ip address 6.6.6.6 255.255.255.0
> !
> interface Serial0
> no ip address
> encapsulation frame-relay
> no fair-queue
> !
> interface Serial0.1 point-to-point
> ip address 172.16.1.6 255.255.255.0
> ip ospf network point-to-multipoint
> frame-relay interface-dlci 605
> !
> interface Serial1
> ip address 172.16.26.6 255.255.255.0
> !
> interface Serial2
> no ip address
> shutdown
> !
> interface Serial3
> no ip address
> shutdown
> !
> interface TokenRing0
> no ip address
> shutdown
> !
> interface BRI0
> no ip address
> encapsulation ppp
> shutdown
> dialer pool-member 1
> isdn switch-type basic-ni
> isdn spid1 3840000001 384000
> isdn spid2 3840000002 384010
> no peer neighbor-route
> ppp authentication chap
> !
> interface Dialer0
> ip address 172.16.15.6 255.255.255.0
> encapsulation ppp
> ip ospf demand-circuit
> dialer remote-name nuthin0
> dialer pool 1
> dialer idle-timeout 30
> dialer watch-disable 10
> dialer string 384020
> dialer string 384030
> dialer max-call 4096
> dialer watch-group 1
> dialer-group 2
> ppp authentication chap
> ppp chap hostname r6ip
> ppp chap password 7 02050D4808090631
> !
> router ospf 1
> area 2 range 172.16.161.0 255.255.255.224
> network 6.6.6.0 0.0.0.255 area 0
> network 140.10.1.0 0.0.0.255 area 10
> network 172.16.1.0 0.0.0.255 area 0
> network 172.16.15.0 0.0.0.255 area 15
> network 172.16.26.0 0.0.0.255 area 26
> network 172.16.161.0 0.0.0.255 area 2
> !
> router bgp 6000
> bgp confederation identifier 1
> bgp confederation peers 6001
> neighbor 5.5.5.5 remote-as 6000
> neighbor 5.5.5.5 update-source Loopback4
> neighbor 172.16.26.2 remote-as 2
> no auto-summary
> !
> ip classless
> no ip http server
> !
> access-list 101 deny ospf any any
> access-list 101 permit ip any any
> dialer watch-list 1 ip 172.16.1.0 255.255.255.0
> dialer-list 1 protocol ip list 101
> dialer-list 2 protocol ip permit
> !
> !
> line con 0
> exec-timeout 0 0
> logging synchronous
> transport input none
> line aux 0
> line vty 0 4
> exec-timeout 0 0
> logging synchronous
> login
> !
> end
>
> r6#sh ip bgp summ
> BGP router identifier 172.16.161.9, local AS number 6000
> BGP table version is 1, main routing table version 1
>
> Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
> State/PfxRcd
> 5.5.5.5 4 6000 47 47 1 0 0 00:44:49
0
> 172.16.26.2 4 2 48 48 1 0 0 00:45:49
0
>
> #### r5 #### AS1 (confed 6000)
>
> Current configuration:
> !
> version 12.1
> service timestamps debug uptime
> service timestamps log uptime
> no service password-encryption
> !
> hostname r5
> !
> !
> username r6ip password 0 ciscoip
> username all
> !
> !
> !
> !
> ip subnet-zero
> no ip domain-lookup
> !
> isdn switch-type basic-ni
> cns event-service server
> !
> !
> !
> !
> !
> interface Loopback0
> ip address 5.5.5.5 255.255.255.0
> !
> interface Ethernet0
> no ip address
> shutdown
> !
> interface Serial0
> no ip address
> encapsulation frame-relay
> !
> interface Serial0.1 multipoint
> ip address 172.16.1.5 255.255.255.0
> ip ospf network point-to-multipoint
> frame-relay map ip 172.16.1.4 504 broadcast
> frame-relay map ip 172.16.1.6 506 broadcast
> !
> interface Serial0.2 point-to-point
> ip address 172.16.2.5 255.255.255.0
> frame-relay interface-dlci 503
> !
> interface Serial1
> no ip address
> shutdown
> !
> interface Serial2
> no ip address
> shutdown
> !
> interface Serial3
> no ip address
> shutdown
> !
> interface BRI0
> no ip address
> encapsulation ppp
> shutdown
> dialer pool-member 1
> isdn switch-type basic-ni
> isdn spid1 3840200001 384020
> isdn spid2 3840200002 384030
> no peer neighbor-route
> ppp authentication chap
> !
> interface Dialer0
> ip address 172.16.15.5 255.255.255.0
> encapsulation ppp
> dialer remote-name r6ip
> dialer pool 1
> dialer max-call 4096
> dialer-group 2
> ppp authentication chap
> ppp chap password 7 14141B180F0B
> !
> router ospf 1
> summary-address 172.16.240.0 255.255.248.0
> redistribute rip subnets
> network 5.5.5.0 0.0.0.255 area 0
> network 172.16.1.0 0.0.0.255 area 0
> network 172.16.15.0 0.0.0.255 area 15
> !
> router rip
> version 1
> redistribute ospf 1 metric 3 match internal external 1 external 2
> passive-interface default
> no passive-interface Serial0.2
> network 172.16.0.0
> default-information originate
> no auto-summary
> !
> router bgp 6000
> bgp confederation identifier 1
> bgp confederation peers 6001
> neighbor 4.4.4.4 remote-as 6001
> neighbor 4.4.4.4 update-source Loopback0
> neighbor 6.6.6.6 remote-as 6000
> neighbor 6.6.6.6 update-source Loopback0
> no auto-summary
> !
> ip classless
> no ip http server
> !
> access-list 101 deny ospf any any
> access-list 101 permit ip any any
> dialer-list 1 protocol ip list 101
> dialer-list 2 protocol ip permit
> !
> !
> line con 0
> exec-timeout 0 0
> logging synchronous
> transport input none
> line aux 0
> line vty 0 4
> exec-timeout 0 0
> logging synchronous
> login
> !
> end
>
> r5#sh ip bgp summ
> BGP router identifier 5.5.5.5, local AS number 6000
> BGP table version is 1, main routing table version 1
>
> Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
> State/PfxRcd
> 4.4.4.4 4 6001 0 0 0 0 0 never Idle
> 6.6.6.6 4 6000 49 49 1 0 0 00:46:52
0
>
> #### r4 ###### AS1 (confed 6001)
>
> Building configuration...
>
> Current configuration:
> !
> version 12.1
> service timestamps debug uptime
> service timestamps log uptime
> no service password-encryption
> !
> hostname r4
> !
> !
> !
> !
> !
> !
> ip subnet-zero
> no ip domain-lookup
> !
> cns event-service server
> !
> !
> !
> !
> !
> interface Loopback0
> ip address 172.16.144.4 255.255.255.0
> !
> interface Loopback1
> ip address 172.16.145.4 255.255.255.0
> !
> interface Loopback2
> ip address 172.16.146.4 255.255.255.0
> !
> interface Loopback3
> ip address 4.4.4.4 255.255.255.0
> !
> interface Ethernet0
> no ip address
> shutdown
> !
> interface Serial0
> ip address 172.16.1.4 255.255.255.0
> encapsulation frame-relay
> ip ospf network point-to-multipoint
> no fair-queue
> frame-relay map ip 172.16.1.5 405 broadcast
> frame-relay map ip 172.16.1.6 405 broadcast
> !
> interface Serial1
> ip address 172.16.129.4 255.255.252.0
> clockrate 2000000
> !
> router eigrp 1
> redistribute ospf 1 match internal external 1 external 2
> passive-interface Ethernet0
> passive-interface Serial0
> network 4.4.4.0 0.0.0.255
> network 172.16.0.0
> default-metric 2000 1000 255 1 1500
> no auto-summary
> !
> router ospf 1
> area 4 range 172.16.144.0 255.255.255.252
> redistribute eigrp 1 metric-type 1 subnets
> network 172.16.1.0 0.0.0.255 area 0
> network 172.16.129.4 0.0.0.0 area 3
> network 172.16.144.0 0.0.0.255 area 4
> !
> router bgp 6001
> bgp confederation identifier 1
> bgp confederation peers 6000
> neighbor 1.1.1.1 remote-as 6001
> neighbor 1.1.1.1 update-source Loopback3
> neighbor 5.5.5.5 remote-as 6000
> neighbor 5.5.5.5 update-source Loopback3
> no auto-summary
> !
> ip classless
> no ip http server
> !
> !
> !
> line con 0
> exec-timeout 0 0
> logging synchronous
> transport input none
> line aux 0
> line vty 0 4
> exec-timeout 0 0
> logging synchronous
> login
> !
> end
>
> r4#sh ip bgp summ
> BGP router identifier 172.16.146.4, local AS number 6001
> BGP table version is 1, main routing table version 1
>
> Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
> State/PfxRcd
> 1.1.1.1 4 6001 671 671 1 0 0 11:08:44
0
> 5.5.5.5 4 6000 0 0 0 0 0 never Idle
>
>
> ##### r1 ##### AS1 connects to AS2 via s1 (confed 6001)
>
> Building configuration...
>
> Current configuration:
> !
> version 12.1
> service timestamps debug uptime
> service timestamps log uptime
> no service password-encryption
> !
> hostname r1
> !
> !
> username all
> !
> !
> !
> !
> ip subnet-zero
> no ip domain-lookup
> !
> cns event-service server
> !
> !
> !
> !
> !
> interface Loopback0
> ip address 172.16.50.26 255.255.255.252
> !
> interface Loopback1
> ip address 172.16.50.29 255.255.255.252
> !
> interface Loopback2
> ip address 172.16.50.33 255.255.255.252
> !
> interface Loopback3
> ip address 1.1.1.1 255.255.255.0
> !
> interface Ethernet0
> no ip address
> shutdown
> !
> interface Serial0
> ip address 172.16.129.1 255.255.252.0
> ip summary-address eigrp 1 172.16.50.0 255.255.255.192 5
> no fair-queue
> !
> interface Serial1
> ip address 11.11.11.1 255.255.255.0
> !
> router eigrp 1
> network 1.1.1.0 0.0.0.255
> network 172.16.0.0
> no auto-summary
> !
> router bgp 6001
> bgp confederation identifier 1
> bgp confederation peers 6000
> neighbor 4.4.4.4 remote-as 6001
> neighbor 11.11.11.2 remote-as 2
> no auto-summary
> !
> ip classless
> no ip http server
> !
> !
> !
> line con 0
> exec-timeout 0 0
> logging synchronous
> transport input none
> line aux 0
> line vty 0 4
> exec-timeout 0 0
> logging synchronous
> login
> !
> end
>
> r1#sh ip bgp summ
> BGP router identifier 172.16.50.33, local AS number 6001
> BGP table version is 1, main routing table version 1
>
> Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
> State/PfxRcd
> 4.4.4.4 4 6001 673 673 1 0 0 11:10:04
0
> 11.11.11.2 4 2 699 699 1 0 0 11:36:33
0
>
> ##### Here are all the configs, the problem points are r4 and r5 where the
> r5 is the hub in a frame cloud of r6<-->r5<-->r4.
>
> Please advise
> Corey M. Ellis
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Corey M. Ellis
> Sent: Sunday, April 15, 2001 10:48 AM
> To: CCIE Mailist
> Subject: BGP trick scenario "Not working"
>
>
> Hi all,
>
> I am trying to do a bgp scenario as follows: I have five routers in the
> scenario, four are in AS1 (r6<-->r5<-->r4<-->r1) and AS2 (r2). In AS1 I
> have a frame cloud with r5 as a multipoint hub and r6 and r4 as the spokes
> all in one network. I also have full routes for all networks via OSPF.
>
> I am trying to configure BGP as follows:
> r6<-->r5 in one confederation 6000
> r4<-->r1 in one confederation 6001
>
> r6<-->r2 EBGP connection to AS2
> r1<-->r2 EBGP connection to AS2
>
> Problems, all the neighbors are connected except the neighbor connection
> between r5<-->r4. This connection should connect the confederations. I
> think the reason it won't connect is because r5 is a multipoint interface,
> and the fact that all three routers r6,r5,r4 are in the same network. Is
> this indeed a problem, or should this connection be working. I had
thought
> about tunneling this connection, or I am pretty sure point-to-point
> interfaces will work, but I did want to change the underlying setup to
much.
> I am trying to practice confederations, meds, etc. Since r2 has two
> connections into AS1. Any ideas as to why my connection between
> confederations is not working. I think its due to the multipoint, but I
> want to be sure.
>
> Thanks
>
> Corey M. Ellis "(test in 4 days)" Last minute brush ups
> **Please read:http://www.groupstudy.com/list/posting.html
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