Cisco Systems A9014CFD Service instance number ethernet name, Encapsulation dot1q dot1ad untagged

Chapter 8 Configuring Ethernet Virtual Connections

Configuring EFPs

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	interface interface-id	Specify the interface, and enter interface configuration mode.
		Valid interfaces are physical ports.
Step 3
	service instance number ethernet [name]	Configure an EFP (service instance) and enter service instance
		configuration) mode.
		• The number is the EFP identifier, an integer from 1 to 4000.
		• (Optional) ethernet name is the name of a previously
		configured EVC. You do not need to use an EVC name in a
		service instance.
Step 4
	encapsulation {dot1q dot1ad untagged	Configure encapsulation type for the service instance.
	default}	• dot1q—Configure 802.1Q encapsulation. See Table 8-1for
		details about options for this keyword.
		• dot1ad—Configure 802.1ad encapsulation.
		• untagged—Map to untagged VLANs. Only one EFP per port
		can have untagged encapsulation.
		• default—Configures default encapsulation.
Step 5
	bridge-domain bridge-id[split-horizon group	Configure the bridge domain ID. The range is from 1 to 4094.
	group-id]	• (Optional) split-horizon group group-id—Configure a
		split-horizon group. The group ID is from 0 to 31. EFPs in the
		same bridge domain and split-horizon group cannot forward
		traffic between each other, but can forward traffic between
		other EFPs in the same bridge domain but not in the same
		split-horizon group.
		Note You must configure encapsulation before the
		bridge-domainkeyword is available.
Step 6
	rewrite ingress tag pop 1 symmetric	(Optional) Specify that encapsulation modification to occur on
		packets at ingress.
		• pop 1—Pop (remove) the outermost tag.
		• symmetric—Configure the packet to undergo the reverse of
		the ingress action at egress. If a tag is popped at ingress, it is
		pushed (added) at egress.
		Note Although the symmetric keyword appears to be optional,
		you must enter it for rewrite to function correctly.
Step 7
	end	Return to privileged EXEC mode.
Step 8
	show ethernet service instance	Verify your entries.
	show bridge-domain [n split-horizon]
Step 9
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

Note Use the no forms of the commands to remove the service instance, encapsulation type, or bridge domain or to disable the rewrite operation.

Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide

OL-23826-09 8-9