Foundation BGP

Logical Topology

Objectives

Preparing BB1

config t

interface FastEthernet0/1

 ip address 160.5.1.99 255.255.255.0

int loopback 0

ip add 210.15.5.1 255.255.255.0

int loopback 1

ip add 210.15.15.1 255.255.255.0

int loopback 2

ip add 210.15.25.1 255.255.255.0

int loopback 3

ip add 210.15.35.1 255.255.255.0

int loopback 4

ip add 210.15.45.1 255.255.255.0

int loopback 5

ip add 210.15.55.1 255.255.255.0

int loopback 6

ip add 210.15.65.1 255.255.255.0

int loopback 7

ip add 210.15.75.1 255.255.255.0

int loopback 8

ip add 210.15.85.1 255.255.255.0

int loopback 9

ip add 210.15.95.1 255.255.255.0

int loopback 10

ip add 215.10.105.1 255.255.255.0

int loopback 11

ip add 215.10.115.1 255.255.255.0

int loopback 12

ip add 215.10.125.1 255.255.255.0

int loopback 13

ip add 215.10.135.1 255.255.255.0

int loopback 14

ip add 215.10.145.1 255.255.255.0

int loopback 15

ip add 215.10.155.1 255.255.255.0

int loopback 16

ip add 215.10.165.1 255.255.255.0

int loopback 17

ip add 215.10.175.1 255.255.255.0

int loopback 18

ip add 215.10.185.1 255.255.255.0

int loopback 19

ip add 215.10.195.1 255.255.255.0

int loopback 20

ip add 215.10.200.1 255.255.255.0

exit

router bgp 60

network 210.15.5.0

network 210.15.15.0

network 210.15.25.0

network 210.15.35.0

network 210.15.45.0

network 210.15.55.0

network 210.15.65.0

network 210.15.75.0

network 210.15.85.0

network 210.15.95.0

network 215.10.105.0

network 215.10.115.0

network 215.10.125.0

network 215.10.135.0

network 215.10.145.0

network 215.10.155.0

network 215.10.165.0

network 215.10.175.0

network 215.10.185.0

network 215.10.195.0

network 215.10.205.0

exit

exit

wr

Objective 1 and 2/ EBGP between R6 and BB1

Router 6

config t

router BGP 6050

neighbor 160.5.1.99 remote-as 60

show ip bgp summery

show ip bgp

Objective 2

Router 6

config t

router BGP 6050

neighbor 10.6.6.6 remote-as 6050

neighbor 10.3.3.3 update-source loopback 0

Router 3

config t

router BGP 6050

neighbor 10.6.6.6 remote-as 6050

neighbor 10.6.6.6 update-source loopback 0

neighbor 10.2.2.2 remote-as 6050

neighbor 10.2.2.2 update-source loopback 0

show ip bgp summery

show ip route

Router 6

config t

router bgp 6050

neighbor 10.3.3.3 next-hop-self

clear ip bgp *

Router 2

config t

router bgp 6050

neighbor 10.3.3.3 remote-as 6050

neighbor bgp update-source loopback 0

Route reflector

Router 3

router bgp 6050

neighbor 10.2.2.2 route reflector client

neighbor 10.6.6.6 route reflector client

to reflect routes comming in from R6 to R2

to reflect routes comming in from R2 to R6

Objective 6/ EBGP between R1 and R2

Router 1

router bgp 112

 neighbor 10.2.2.2 remote-as 6050

 neighbor 10.2.2.2 ebgp-multihop 10

 neighbor 10.2.2.2 update-source Loopback0

Router 2

router bgp 6050

 neighbor 10.1.1.1 remote-as 112

 neighbor 10.1.1.1 ebgp-multihop 10

 neighbor 10.1.1.1 update-source Loopback0

Explanation

"ebgp-multihop" to allow routers to be EBGP neighbour even if its not connected directly to each other. 

"10" no of hops it can cross to form a EBGP neighbor relationship.

Testing redundancy

Trace-route to R2 loopback 0 without failure 

R1#traceroute 10.2.2.2

Type escape sequence to abort.

Tracing the route to 10.2.2.2

  1 130.13.11.2 20 msec *  36 msec

R1#

as of now the router 1 one hop to communicating with R2 

now shutdown Ethernet port on R1 connected to R2

R1(config-if)#shutdown

R1(config-if)#

*Mar  1 01:01:24.543: %OSPF-5-ADJCHG: Process 1, Nbr 2.2.2.2 on FastEthernet0/0 from FULL to DOWN, Neighbor Down: Interface down or detached

R1(config-if)#

*Mar  1 01:01:26.535: %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to administratively down

*Mar  1 01:01:27.535: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down

R1(config-if)#

Not Pinging !!!!!!!!

ospf troublshooting

R1 and R7 are not OSPF neighbour

the OSPF interface are on "NON BROADCAST" mode which will not work on frame relay cloud.

change the ospf interface to point to point on bothe the routers

intterface XXX

ip ospf network point-to-point

NOW Pingin

R1#traceroute 10.2.2.2

Type escape sequence to abort.

Tracing the route to 10.2.2.2

  1 129.186.17.7 36 msec 52 msec 36 msec

  2 129.186.35.3 36 msec 84 msec 16 msec

  3 129.186.23.2 108 msec *  120 msec

R1#

However BGP is not working

Reason area 17 is configured as stubby area which will not receive any external routes.

Router 1

config t

router ospf 1

no area 17 sub

area 17 nssa no-sum

Router 7

config t

router ospf 1

no area 17 sub

area 17 nssa no-sum

Show ip bgp n

Neighbor        V    AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd

10.2.2.2        4  6050      18      18       19    0    0 00:14:22       18

show ip bgp

R1#show ip bgp

BGP table version is 57, local router ID is 10.1.1.1

Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,

              r RIB-failure, S Stale

Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path

*> 210.15.5.0       10.2.2.2                               0 6050 60 i

*> 210.15.15.0      10.2.2.2                               0 6050 60 i

*> 210.15.25.0      10.2.2.2                               0 6050 60 i

*> 210.15.35.0      10.2.2.2                               0 6050 60 i

*> 210.15.45.0      10.2.2.2                               0 6050 60 i

*> 210.15.55.0      10.2.2.2                               0 6050 60 i

*> 210.15.65.0      10.2.2.2                               0 6050 60 i

*> 210.15.75.0      10.2.2.2                               0 6050 60 i

*> 210.15.85.0      10.2.2.2                               0 6050 60 i

*> 210.15.95.0      10.2.2.2                               0 6050 60 i

*> 215.10.105.0     10.2.2.2                               0 6050 60 i

*> 215.10.115.0     10.2.2.2                               0 6050 60 i

*> 215.10.125.0     10.2.2.2                               0 6050 60 i

*> 215.10.135.0     10.2.2.2                               0 6050 60 i

*> 215.10.145.0     10.2.2.2                               0 6050 60 i

*> 215.10.155.0     10.2.2.2                               0 6050 60 i

*> 215.10.165.0     10.2.2.2                               0 6050 60 i

*> 215.10.175.0     10.2.2.2                               0 6050 60 i

*> 215.10.185.0     10.2.2.2                               0 6050 60 i

*> 215.10.195.0     10.2.2.2                               0 6050 60 i

R1# show ip bgp sum

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd

10.2.2.2 4 6050 36 35 19 0 0 00:31:12 18

R2#show ip bgp summary

BGP router identifier 10.2.2.2, local AS number 6050

BGP table version is 19, main routing table version 19

18 network entries using 1818 bytes of memory

18 path entries using 864 bytes of memory

1 BGP path attribute entries using 60 bytes of memory

1 BGP rrinfo entries using 24 bytes of memory

1 BGP AS-PATH entries using 24 bytes of memory

0 BGP route-map cache entries using 0 bytes of memory

0 BGP filter-list cache entries using 0 bytes of memory

BGP using 2790 total bytes of memory

BGP activity 18/0 prefixes, 18/0 paths, scan interval 60 secs

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd

10.1.1.1 4 112 34 35 19 0 0 00:30:41 0

10.3.3.3 4 6050 53 52 19 0 0 00:48:09 18

Objective 7

Router 1

config t

int loopback 1

ip add 100.100.100.1 255.255.255.0

exit

ip access-list 79 permit 100.100.100.0 0.0.0.255

routemap REDIST_BGP

match ip address 79

exit

router bgp 112

redistribute connected rute-map REDIST_BGP

exit

exit

show ip bgp

R1#show ip bgp

BGP table version is 58, local router ID is 10.1.1.1

Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,

              r RIB-failure, S Stale

Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path

*> 100.100.100.0/24 0.0.0.0                  0         32768 ?

*> 210.15.5.0       10.2.2.2                               0 6050 60 i

*> 210.15.15.0      10.2.2.2                               0 6050 60 i

*> 210.15.25.0      10.2.2.2                               0 6050 60 i

*> 210.15.35.0      10.2.2.2                               0 6050 60 i

*> 210.15.45.0      10.2.2.2                               0 6050 60 i

*> 210.15.55.0      10.2.2.2                               0 6050 60 i

*> 210.15.65.0      10.2.2.2                               0 6050 60 i

*> 210.15.75.0      10.2.2.2                               0 6050 60 i

*> 210.15.85.0      10.2.2.2                               0 6050 60 i

*> 210.15.95.0      10.2.2.2                               0 6050 60 i

*> 215.10.105.0     10.2.2.2                               0 6050 60 i

*> 215.10.115.0     10.2.2.2                               0 6050 60 i

*> 215.10.125.0     10.2.2.2                               0 6050 60 i

*> 215.10.135.0     10.2.2.2                               0 6050 60 i

*> 215.10.145.0     10.2.2.2                               0 6050 60 i

*> 215.10.155.0     10.2.2.2                               0 6050 60 i

   Network          Next Hop            Metric LocPrf Weight Path

*> 215.10.165.0     10.2.2.2                               0 6050 60 i

*> 215.10.175.0     10.2.2.2                               0 6050 60 i

*> 215.10.185.0     10.2.2.2                               0 6050 60 i

*> 215.10.195.0     10.2.2.2                               0 6050 60 i

R1#

Fix

config t

routemap REDIST_BGP 10

set origen igp

show ip bgp

R1#show ip bgp

BGP table version is 59, local router ID is 10.1.1.1

Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,

              r RIB-failure, S Stale

Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path

*> 100.100.100.0/24 0.0.0.0                  0         32768 i

*> 210.15.5.0       10.2.2.2                               0 6050 60 i

*> 210.15.15.0      10.2.2.2                               0 6050 60 i

*> 210.15.25.0      10.2.2.2                               0 6050 60 i

*> 210.15.35.0      10.2.2.2                               0 6050 60 i

*> 210.15.45.0      10.2.2.2                               0 6050 60 i

*> 210.15.55.0      10.2.2.2                               0 6050 60 i

*> 210.15.65.0      10.2.2.2                               0 6050 60 i

*> 210.15.75.0      10.2.2.2                               0 6050 60 i

*> 210.15.85.0      10.2.2.2                               0 6050 60 i

*> 210.15.95.0      10.2.2.2                               0 6050 60 i

*> 215.10.105.0     10.2.2.2                               0 6050 60 i

*> 215.10.115.0     10.2.2.2                               0 6050 60 i

*> 215.10.125.0     10.2.2.2                               0 6050 60 i

*> 215.10.135.0     10.2.2.2                               0 6050 60 i

*> 215.10.145.0     10.2.2.2                               0 6050 60 i

*> 215.10.155.0     10.2.2.2                               0 6050 60 i

*> 215.10.165.0     10.2.2.2                               0 6050 60 i

*> 215.10.175.0     10.2.2.2                               0 6050 60 i

*> 215.10.185.0     10.2.2.2                               0 6050 60 i

*> 215.10.195.0     10.2.2.2                               0 6050 60 i