BGP Routing Policies - Foundation Summary - Command Reference

20 important questions on BGP Routing Policies - Foundation Summary - Command Reference

What is the command mode and desciption of
bgp bestpath med confed?

BGP mode; tells the router to consider
MED for choosing routes through different
confederation sub-ASs

What is the command mode and desciption of
bgp bestpath med missing-as-worst?

BGP mode; resets the default MED from 0 to
the maximum (232 – 1)

What is the command mode and desciption of
bgp default local-preference number?

BGP mode; sets the default LOCAL_PREF
value
  • Higher grades + faster learning
  • Never study anything twice
  • 100% sure, 100% understanding
Discover Study Smart

What is the command mode and desciption of
bgp deterministic-med?

BGP mode; tells IOS to process MED logic
based on neighboring AS, rather than on the
order in which the routes were learned

What is the command mode and desciption of
bgp maxas-limit number?

BGP mode; tells the router to discard routes
whose AS_PATH length exceeds this setting

What is the command mode and desciption of
distribute-list acl-number | prefix list-name in | out?

BGP mode; defines a BGP distribution list
(ACL or prefix list) for filtering routes

What is the command mode and desciption of ip bgp-community new-format?

Global config; tells IOS to display and
interpret the COMMUNITY PA in the RFC
1997 format, AA:NN

What is the command mode and desciption of
ip community-list { standard | standard listname
{ deny | permit } [ community-number ]
[ AA : NN ] [ internet ] [ local-AS ] [ no-advertise ]
[ no-export ]} | { expanded | expanded listname
{ deny | permit } regexp }?

Global config; creates entries in a community
list used in matching existing COMMUNITY
values

What is the command mode and desciption of
neighbor { ip-address | peer-group-name }
local-as as-number [ no-prepend ]?

BGP mode;
Defines an alternate ASN to be prepended in the AS_PATH of sent eBGP Updates, instead of the ASN listed in the router bgp command

What is the command mode and desciption of
neighbor { ip-address | peer-group-name } prefix-list { prefix-list-name | clns-filterexpr-name | clns-filter-set-name } { in | out }?

BGP mode; identifies an IP prefix list used to
filter NLRIs being sent to or received from
the neighbor

What is the command mode and desciption of neighbor { ip-address | peer-group-name } remove-private-as?

BGP mode; used with eBGP peers, removes any private ASNs from the AS_PATH under certain conditions

What is the command mode and desciption of
neighbor ip-address route-reflector-client?

BGP mode; used on the RR server, identifies a neighbor as an RR client

What is the command mode and desciption of
neighbor { ip-address | peer-groupname} send-community [ both | standard | extended?

BGP mode; causes the router to include the COMMUNITY PA in Updates sent to this neighbor

What is the command mode and desciption of
neighbor { ip-address | peer-group-name } unsuppress-map route-map-name

BGP mode; allows a router to identify previously suppressed routes and no longer suppress them

What is the command mode and desciption of
network ip-address backdoor

BGP mode; identifies a network as a backdoor route, considering it to have the same administrative distance as iBGP routes

What is the command mode and desciption of
show ip bgp regexp regexp

EXEC mode; displays BGP table entries whose AS_PATH PA is matched by the stated regex

What is the command mode and desciption of
show ip community-list [ standardcommunity-list-number | extendedcommunity-list-number | community-listname] [ exact-match ]

EXEC mode; lists the contents of configured IP community lists

What is the command mode and desciption of
show ip bgp community communitynumber [ exact ]

EXEC mode; lists BGP table entries that include the listed COMMUNITY

What is the command mode and desciption of
show ip bgp filter-list access-list-number

EXEC mode; lists the contents of AS_PATH access lists

What is the command mode and desciption of
neighbor ip-address fall-over [ route-map map-name ]

BGP mode; eBGP session between directly connected eBGP neighbors will be torn down the moment the connected subnet between the peers is lost

The question on the page originate from the summary of the following study material:

  • A unique study and practice tool
  • Never study anything twice again
  • Get the grades you hope for
  • 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
Trustpilot Logo