Chapter 12: Advanced BGP

Question 1

Configure a prefix list

Answer 1

{ip | ipv6} prefix-list “prefix list name” [seq “sequence number”] {permit | deny} “high order bit pattern/high order bit count” [ge “ge value”] [le “le value”]

Question 2

Create a route map entry

Answer 2

route-map “route map name” [permit | deny] [“sequence number”]

Question 3

Conditionally match a route map by using the AS path

Answer 3

match as-path “acl number”

Question 4

Conditionally match in a route map by using an ACL

Answer 4

match ip address {“acl number | acl name”}

Question 5

Conditionally match in a route map by using a prefix list

Answer 5

match ip address prefix-list “prefix list name”

Question 6

Conditionally match in a route map by using a local preference

Answer 6

match local-preference “local preference”

Question 7

Filter routes to a BGP neighbor by using an ACL

Answer 7

neighbor “ip address” distribute-list {“acl number | acl name” {in | out}

Question 8

Filter routes to a BGP neighbor by using a prefix list

Answer 8

neighbor “ip address” prefix-list “prefix list name” {in | out}

Question 9

Create an ACL based on the BGP AS path

Answer 9

ip as-path access-list “acl number” {deny | permit}

Question 10

Filter routes to a BGP neighbor by using an AS path ACL

Answer 10

neighbor “ip address” filter-list “acl number” {in | out}

Question 11

Associate an inbound or outbound route map with a specific BGP neighbor

Answer 11

neighbor “ip address” route-map “route map name” {in | out}

Question 12

Configure IOS based routers to display the community in new format for easier readability of BGP communities

Answer 12

ip bgp-community new-format

Question 13

Create a BGP community list for conditional route matching

Answer 13

ip community-list {“1-500” | standard “list name” | expanded “list name”}{permit | deny} “community-pattern

Question 14

Set BGP communities in a route map

Answer 14

set community “bgp community” [additive]

Question 15

Initiate a route refresh for a specific BGP peer

Answer 15

clear bgp “afi safi {ip address | *}” soft [ in | out]

Question 16

Display the current BGP table, based on routes that meet a specified AS path regex pattern

Answer 16

show bgp “afi safi” regexp “regex-pattern”

Question 17

Display the current BGP table, based on routes that meet a specified BGP community

Answer 17

show bgp “afi safi” community “community”