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Chapter 8
Configuring Basic BGP
Answers to Review Questions
1.
E. The Router ID, BGP process number, external neighbors, and
internal peers are all needed to configure BGP.
2.
A. The
show ip bgp routes
command is used to view all the
learned BGP routes.
3.
D. The only valid command statements shown above for configuring
BGP are router bgp 100 and neighbor 10.1.1.1 remote-as 200.
4.
D. The only commands that are shown above that are valid to enable
BGP and identify an external BGP neighbor are router bgp 100 and
neighbor 10.1.1.1 remote-as 200.
5.
A, B, C. The valid BGP show commands listed above
are show ip bgp, show ip bgp paths, and show ip bgp summary.
The show ip bgp command displays the BGP routing table. The show
ip bgp paths
command displays all the router's known BGP paths.
The show ip bgp summary command tells you the status on every
BGP connection. The other two commands are not valid.
6.
A. The
remote-as
syntax identifies the peer router that the local
router will enable a session with. The IP address identifies the interface
attached to the peer router. If the ASN is the same number as the inter-
nal ASN, it identifies an internal AS; if it is different, it identifies an
external AS.
7.
D. The network command creates a route in the BGP table if the route
is present in the IP table.
8.
B. The
clear ip bgp *
command is used to clear all the entries in
the BGP table.
9.
C. The MED attribute is used to inform other external AS routers as
to which route to use in order to receive traffic.
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