Cisco Systems 3750E manual Ip msdp sa-filter in ip-address name, 43-15

Chapter 43 Configuring MSDP

Configuring MSDP

Beginning in privileged EXEC mode, follow these steps to apply a filter. This procedure is optional.

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2 ip msdp sa-filter in ip-addressname		Filter all SA messages from the specified MSDP peer.
	or	or
	ip msdp sa-filter in {ip-addressname}	From the specified peer, pass only those SA messages that pass the IP
	list access-list-number	extended access list. The range for the extended access-list-number
		is 100 to 199.
		If both the list and the route-mapkeywords are used, all conditions
		must be true to pass any (S,G) pair in incoming SA messages.
	or	or
	ip msdp sa-filter in {ip-addressname}	From the specified MSDP peer, pass only those SA messages that meet
	route-map map-tag	the match criteria in the route map map-tag.
		If all match criteria are true, a permit from the route map passes routes
		through the filter. A deny will filter routes.
Step 3
	access-listaccess-list-number {deny	(Optional) Create an IP extended access list, repeating the command as
	permit} protocol source source-wildcard	many times as necessary.
	destination destination-wildcard	• For access-list-number, enter the number specified in Step 2.
		• The deny keyword denies access if the conditions are matched. The
		permit keyword permits access if the conditions are matched.
		• For protocol, enter ip as the protocol name.
		• For source, enter the number of the network or host from which the
		packet is being sent.
		• For source-wildcard, enter the wildcard bits in dotted decimal
		notation to be applied to the source. Place ones in the bit positions
		that you want to ignore.
		• For destination, enter the number of the network or host to which
		the packet is being sent.
		• For destination-wildcard, enter the wildcard bits in dotted decimal
		notation to be applied to the destination. Place ones in the bit
		positions that you want to ignore.
		Recall that the access list is always terminated by an implicit deny
		statement for everything.
Step 4
	end	Return to privileged EXEC mode.
Step 5
	show running-config	Verify your entries.
Step 6
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

To remove the filter, use the no ip msdp sa-filter in {ip-address name} [list access-list-number] [route-mapmap-tag] global configuration command.

This example shows how to filter all SA messages from the peer named switch.cisco.com:

Switch(config)# ip msdp peer switch.cisco.com connect-source gigabitethernet1/0/1

Switch(config)# ip msdp sa-filter in switch.cisco.com

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02		43-15