Troubleshooting A Prefix List - HP 7102dl - ProCurve Secure Router Configuration Manual

IP Routing—Configuring RIP, OSPF, BGP, and PBR
Troubleshooting Routing
Number of
statements in
the list.
15-172
If you want a router to advertise routes it receives from one BGP neighbor to
another, you must configure the AS it should add to the AS path. You configure
this setting from the configuration mode context of the BGP neighbor from
which the router receives the route. Enter:
Syntax: local-as <AS>
If the router still cannot send or receive routes, then it is probably having
trouble connecting to the neighbor. (See "A BGP Interface Cannot Communi-
cate with a Neighbor" on page 15-168.)

Troubleshooting a Prefix List

Use the following enable mode command to view a prefix list:
Syntax: show ip prefix-list [detail | summary] <listname>
The detail and summary keywords are optional and mutually exclusive. If
you enter only the listname, then you can view the permit and deny statements,
listed by sequence number. If you use the summary keyword, then you will
see only the number of statements, their sequence numbers, and the number
of these statements that include a range of valid prefixes.
Entering the detail keyword produces all the information shown by the other
two commands, as well as the number of packets the router has matched to
each statement. Looking for a statement that has had no hits can point you
towards the statement with the misconfiguration.
If the entire list has no hits, then you may have forgotten to apply the list to
the neighbor. (If you are applying the list to a route map, make sure that the
map has been applied to the neighbor.) You should also verify that the list is
correctly applied to either inbound or outbound data.
Figure 15-41 shows the output of a detailed command.
ProCurve# show ip prefix-list detail MyList
ip prefix-list MyList
count: 2, range entries 1, sequence 10-20 (total hit count: 50)
Number of statements
that filter a range of
routes.
seq 10, deny 10.1.3.0/24 (hit count: 10)
seq 20, permit 10.1.0.0/16 ge 24 le 24 (hit count: 40)
Figure 15-41. Viewing a Prefix List
Number of routes
filtered by this
statement.