Studying the Routing Bits

Prefer path to reach 123.123.123.123/32 is R6>R5>R2>R3 without manipulating bgp attributes of path selection.

Configuration

R1

interface Loopback0
ip address 1.1.1.1 255.255.255.255
!
interface FastEthernet0/0
ip address 192.168.13.1 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.14.1 255.255.255.0
duplex auto
speed auto
!
router ospf 1
log-adjacency-changes
network 1.1.1.1 0.0.0.0 area 0
network 192.168.13.1 0.0.0.0 area 0
!
router bgp 123
no synchronization
bgp log-neighbor-changes
neighbor IBGP peer-group
neighbor IBGP remote-as 123
neighbor IBGP update-source Loopback0
neighbor IBGP next-hop-self
neighbor 2.2.2.2 peer-group IBGP
neighbor 3.3.3.3 peer-group IBGP
neighbor 192.168.14.4 remote-as 4
no auto-summary

R2

interface Loopback0
ip address 2.2.2.2 255.255.255.255
!
interface FastEthernet0/0
ip address 192.168.23.2 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.25.2 255.255.255.0
duplex auto
speed auto
!
router ospf 1
log-adjacency-changes
network 2.2.2.2 0.0.0.0 area 0
network 192.168.23.2 0.0.0.0 area 0
!
router bgp 123
no synchronization
bgp log-neighbor-changes
bgp inject-map INJECT exist-map EXIST
neighbor IBGP peer-group
neighbor IBGP remote-as 123
neighbor IBGP update-source Loopback0
neighbor IBGP next-hop-self
neighbor 1.1.1.1 peer-group IBGP
neighbor 3.3.3.3 peer-group IBGP
neighbor 192.168.25.5 remote-as 5
no auto-summary
!
ip prefix-list EXIST seq 5 permit 123.123.0.0/16
!
ip prefix-list INJECT seq 5 permit 123.123.123.0/24
!
ip prefix-list SOURCE seq 5 permit 3.3.3.3/32
!
route-map INJECT permit 10
set ip address prefix-list INJECT
!
route-map EXIST permit 10
match ip address prefix-list EXIST
match ip route-source prefix-list SOURCE

R3

interface Loopback0
ip address 3.3.3.3 255.255.255.255
!
interface Loopback1
ip address 123.123.123.123 255.255.255.255
!
interface FastEthernet0/0
ip address 192.168.13.3 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.23.3 255.255.255.0
duplex auto
speed auto
!
router ospf 1
log-adjacency-changes
network 3.3.3.3 0.0.0.0 area 0
network 192.168.13.3 0.0.0.0 area 0
network 192.168.23.3 0.0.0.0 area 0
!
router bgp 123
no synchronization
bgp log-neighbor-changes
network 123.123.0.0 mask 255.255.0.0
neighbor IBGP peer-group
neighbor IBGP remote-as 123
neighbor IBGP update-source Loopback0
neighbor 1.1.1.1 peer-group IBGP
neighbor 2.2.2.2 peer-group IBGP
no auto-summary
!
ip forward-protocol nd
ip route 123.123.0.0 255.255.0.0 Null0

R4

interface FastEthernet0/0
ip address 192.168.14.4 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.46.4 255.255.255.0
duplex auto
speed auto
!
router bgp 4
no synchronization
bgp log-neighbor-changes
neighbor 192.168.14.1 remote-as 123
neighbor 192.168.46.6 remote-as 6
no auto-summary

R5

interface FastEthernet0/0
ip address 192.168.25.5 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.56.5 255.255.255.0
duplex auto
speed auto
!
router bgp 5
no synchronization
bgp log-neighbor-changes
neighbor 192.168.25.2 remote-as 123
neighbor 192.168.56.6 remote-as 6
no auto-summary

R6

interface Loopback0
ip address 6.6.6.6 255.255.255.255
!
interface FastEthernet0/0
ip address 192.168.46.6 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.56.6 255.255.255.0
duplex auto
speed auto
!
router bgp 6
no synchronization
bgp log-neighbor-changes
network 6.6.6.6 mask 255.255.255.255
neighbor 192.168.46.4 remote-as 4
neighbor 192.168.46.4 route-map OUT out
neighbor 192.168.56.5 remote-as 5
neighbor 192.168.56.5 route-map OUT out
no auto-summary
!
ip as-path access-list 1 permit ^$
!
route-map OUT permit 10
match as-path 1

Verification

R6#show ip bgp
   Network          Next Hop            Metric LocPrf Weight Path
*> 6.6.6.6/32       0.0.0.0                  0         32768 i
*> 123.123.0.0/16   192.168.46.4                           0 4 123 i
*                   192.168.56.5                           0 5 123 i
*> 123.123.123.0/24 192.168.56.5                           0 5 123 ?
R6#traceroute 123.123.123.123 source loopback 0
Type escape sequence to abort.
Tracing the route to 123.123.123.123
1 192.168.56.5 16 msec 48 msec 20 msec
2 192.168.25.2 44 msec 44 msec 28 msec
3 192.168.23.3 68 msec * 100 msec
GNS File : http://www.4shared.com/rar/sQJLhAdW/bgp_conditional_route_injectio.html

Ethernet - R1>R4

Frame-Relay - R3>R5

Configuration

pseudowire-class R4R5

encapsulation mpls
interworking ip
!
interface Loopback0
ip address 1.1.1.1 255.255.255.255
!
interface FastEthernet1/0
ip address 192.168.12.1 255.255.255.0
speed auto
duplex auto
mpls ip
!
interface FastEthernet1/1
no ip address
speed auto
duplex auto
no keepalive
xconnect 3.3.3.3 1435 pw-class R4R5
!
router ospf 1
log-adjacency-changes
network 1.1.1.1 0.0.0.0 area 0
network 192.168.12.1 0.0.0.0 area 0

interface FastEthernet0/0

ip address 192.168.12.2 255.255.255.0
speed 100
full-duplex
mpls ip
!
interface FastEthernet0/1
ip address 192.168.23.2 255.255.255.0
speed 100
full-duplex
mpls ip
!
router ospf 1
log-adjacency-changes
network 192.168.12.2 0.0.0.0 area 0
network 192.168.23.2 0.0.0.0 area 0

frame-relay switching

!
pseudowire-class R4R5
encapsulation mpls
interworking ip
!
interface Loopback0
ip address 3.3.3.3 255.255.255.255
!
interface POS1/0
mtu 1500
no ip address
encapsulation frame-relay
frame-relay intf-type dce
!
interface FastEthernet2/0
ip address 192.168.23.3 255.255.255.0
speed auto
duplex auto
mpls ip
!
router ospf 1
log-adjacency-changes
network 3.3.3.3 0.0.0.0 area 0
network 192.168.23.3 0.0.0.0 area 0
!
connect FR POS1/0 45 l2transport
xconnect 1.1.1.1 1435 pw-class R4R5

interface Loopback0

ip address 4.4.4.4 255.255.255.255
!
interface FastEthernet0/0
ip address 192.168.45.4 255.255.255.0
ip ospf network point-to-point
!
router ospf 1
log-adjacency-changes
network 4.4.4.4 0.0.0.0 area 0
network 192.168.45.4 0.0.0.0 area 0

interface Loopback0

ip address 5.5.5.5 255.255.255.255
!
interface POS1/0
mtu 1500
ip address 192.168.45.5 255.255.255.0
encapsulation frame-relay
ip ospf network point-to-point
frame-relay map ip 192.168.45.4 45 broadcast
!
router ospf 1
log-adjacency-changes
network 5.5.5.5 0.0.0.0 area 0
network 192.168.45.5 0.0.0.0 area 0

Verification

R1#show mpls l2transport vc

Local intf Local circuit Dest address VC ID Status

------------- -------------------------- --------------- ---------- ----------
Fa1/1 Ethernet 3.3.3.3 1435 UP

R4#ping 192.168.45.5

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.45.5, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 48/86/144 ms

GNS File : http://www.4shared.com/rar/QXFOwL5J/atom_interworking.html

Studying the Routing Bits

Thursday, 7 February 2013

BGP Conditional Route Injection

Tuesday, 5 February 2013

AToM_Interworking(Ethernet to Frame-Relay)