Cisco Router Challenge 78
Outline
This challenge involves the configuration of BGP. The
objectives of this challenge are to:
Commands
# config
t
(config)#
hostname leeds
leeds (config)# router bgp 172
leeds (config-router)# network
205.8.87.0
leeds (config-router)# neighbor
192.168.1.0 remote-as 100
leeds (config-router)# neighbor
192.168.1.0 update-source loopback0
Example
# config
t
(config)#
hostname leeds
(config)#
router bgp 172
(config-router)# network 205.8.87.0
(config-router)# neighbor ?
A.B.C.D Neighbor address
WORD
Neighbor tag
Router(config-router)# neighbor
192.168.1.0 ?
activate Enable the Address Family for
this Neighbor
advertise-map specify route-map for conditional
advertisement
advertisement-interval Minimum interval between sending BGP
routing updates
allowas-in
Accept as-path with my AS present in it
default-originate Originate default route to this neighbor
description Neighbor specific description
distribute-list Filter updates to/from this neighbor
ebgp-multihop Allow EBGP neighbors not on directly
connected
networks
filter-list Establish BGP filters
local-as Specify a local-as number
maximum-prefix Maximum number of prefix accept from
this peer
next-hop-self Disable the next hop calculation for
this neighbor
next-hop-unchanged Propagate the iBGP
paths's next hop unchanged for
this
neighbor
password Set a password
peer-group Member of the peer-group
prefix-list Filter updates to/from this
neighbor
remote-as Specify a BGP neighbor
remove-private-AS Remove private AS number from outbound
updates
route-map Apply route map to neighbor
route-reflector-client Configure a neighbor as Route
Reflector client
send-community Send Community attribute to this
neighbor
shutdown Administratively shut down this
neighbor
soft-reconfiguration Per neighbor soft reconfiguration
timers BGP per neighbor timers
translate-update Translate Update to MBGP format
unsuppress-map
Route-map to selectively unsuppress suppressed
routes
update-source Source of routing updates
version Set the BGP version to match a
neighbor
weight Set default weight for routes
from this neighbor
(config-router)# neighbor 1.2.3.4 remote-
?
<1-65535> AS of remote neighbor
(config-router)# neighbor 1.2.3.4 remote-
1 ?
<cr>
(config-router)# neighbor 192.168.1.0
remote-as 100
(config-router)#
neighbor 192.168.1.0 up ?
BRI
ISDN Basic Rate Interface
FastEthernet FastEthernet
IEEE 802.3
Loopback
Loopback interface
Null
Null interface
Serial
Serial
(config-router)# neighbor 192.168.1.0
update-source loopback0
Topology
The basic topology is defined below, where AS1 is connected to E0, AS2 to
S0, and AS3 to S1.