Foundry Configuration Guide for the FESX, FSX, and FWSX
21 - 88 © Foundry Networks, Inc. December 2005
Displaying the BGP4 Route Table
BGP4 uses filters you define as well as the algorithm described in “How BGP4 Selects a Path for a Route” on
page 21-4 to determine the preferred route to a destination. BGP4 sends only the preferred route to the router’s
IP table. However, if you want to view all the routes BGP4 knows about, you can display the BGP4 table using
either of the following methods.
To view the BGP4 route table, enter the following command:
Syntax: show ip bgp routes [[network] <ip-addr>] | <num> | [age <secs>] | [as-path-access-list <num>] |
[best] | [cidr-only] | [community <num> | no-export | no-advertise | internet | local-as] |
[community-access-list <num>] | [community-list <num> | [detail <option>] | [filter-list <num, num,...>] |
[next-hop <ip-addr>] | [no-best] | [not-installed-best] | [prefix-list <string>] |
[regular-expression <regular-expression>] | [route-map <map-name>] | [summary] | [unreachable]
The <ip-addr> option displays routes for a specific network. The network keyword is optional. You can enter the
network address without entering “network” in front of it.
The <num> option specifies the table entry with which you want the display to start. For example, if you want to list
entries beginning with table entry 100, specify 100.
The age <secs> parameter displays only the routes that have been received or updated more recently than the
number of seconds you specify.
The as-path-access-list <num> parameter filters the display using the specified AS-path ACL.
The best parameter displays the routes received from the neighbor that the Layer 3 Switch selected as the best
routes to their destinations.
The cidr-only option lists only the routes whose network masks do not match their class network length.
The community option lets you display routes for a specific community. You can specify local-as, no-export,
no-advertise, internet, or a private community number. You can specify the community number as either two
five-digit integer values of up to 1– 65535, separated by a colon (for example, 12345:6789) or a single long integer
value.
The community-access-list <num> parameter filters the display using the specified community ACL.
The community-list option lets you display routes that match a specific community filter.
The detail option lets you display more details about the routes. You can refine your request by also specifying
one of the other display options after the detail keyword.
The filter-list option displays routes that match a specific address filter list.
The next-hop <ip-addr> option displays the routes for a given next-hop IP address.
FESX424 Router(config-bgp-router)# show ip bgp routes
Total number of BGP Routes: 97371
Status A:AGGREGATE B:BEST b:NOT-INSTALLED-BEST C:CONFED_EBGP D:DAMPED
E:EBGP H:HISTORY I:IBGP L:LOCAL M:MULTIPATH S:SUPPRESSED
Prefix Next Hop Metric LocPrf Weight Status
1 3.0.0.0/8 192.168.4.106 100 0 BE
AS_PATH: 65001 4355 701 80
2 4.0.0.0/8 192.168.4.106 100 0 BE
AS_PATH: 65001 4355 1
3 4.60.212.0/22 192.168.4.106 100 0 BE
AS_PATH: 65001 4355 701 1 189
4 6.0.0.0/8 192.168.4.106 100 0 BE
AS_PATH: 65001 4355 3356 7170 1455
5 8.8.1.0/24 192.168.4.106 0 100 0 BE
AS_PATH: 65001
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