Configuring Inner and Outer TPIDs and VLAN IDs

For some rewrite operations, you must configure the inner or outer tag-protocol identifier (TPID) values and inner or outer virtual local area network identifier (VLAN ID) values. These values can be applied to either the input VLAN map or the output VLAN map. The stacked and rewriting Gigabit-Ethernet VLAN Tags are also referred to as Q-in-Q tunneling.

On Ethernet IQ, IQ2, and IQ2-E interfaces; on MX Series router Gigabit Ethernet, Tri-Rate Ethernet copper, and 10-Gigabit Ethernet interfaces; and on aggregated Ethernet interfaces using Gigabit Ethernet IQ2 and IQ2-E or 10-Gigabit Ethernet PICs on MX Series routers, to configure the inner TPID, include the inner-tag-protocol-id statement at the following hierarchy levels:
- [edit interfaces interface-name unit logical-unit-number input-vlan-map]
- [edit interfaces interface-name unit logical-unit-number output-vlan-map]
- [edit logical-systems logical-system-name interfaces interface-name unit logical-unit-number input-vlan-map]
- [edit logical-systems logical-system-name interfaces interface-name unit logical-unit-number output-vlan-map]

For the inner VLAN ID, include the inner-vlan-id statement. For the outer TPID, include the tag-protocol-id statement. For the outer VLAN ID, include the vlan-id statement at the [edit interfaces interface-name unit logical-unit-number] hierarchy level or at the [edit logical-systems logical-system-name interfaces interface-name unit logical-unit-number] hierarchy level.

For aggregated Ethernet interfaces using Gigabit Ethernet IQ interfaces, include the tag-protocol-id statement for the outer TPID. For the outer VLAN ID, include the vlan-id statement at the [edit interfaces interface-name unit logical-unit-number] hierarchy level or at the [edit logical-systems logical-system-name interfaces interface-name unit logical-unit-number] hierarchy level.

The VLAN IDs you define in the input VLAN maps are stacked on top of the VLAN ID bound to the logical interface. For more information about binding a VLAN ID to the logical interface, see 802.1Q VLANs Overview.

All TPIDs you include in input and output VLAN maps must be among those you specify at the [edit interfaces interface-name gigether-options ethernet-switch-profile tag-protocol-id [ tpids ]] hierarchy level or [edit interfaces interface-name aggregated-ether-options ethernet-switch-profile tag-protocol-id [ tpids ]] hierarchy level. For more information, see Configuring Frames with Particular TPIDs to Be Processed as Tagged Frames.

Table 1 and Table 2 specify when these statements are required. Table 1 indicates valid statement combinations for rewrite operations for the input VLAN map. “No” means the statement must not be included in the input VLAN map for the rewrite operation. “Optional” means the statement may be optionally specified for the rewrite operation in the input VLAN map. “Any” means that you must include the vlan-id statement, tag-protocol-id statement, inner-vlan-id statement, or inner-tag-protocol-id statement.

Table 1: Rewrite Operations and Statement Usage for Input VLAN Maps
	Input VLAN Map Statements
Rewrite Operation	vlan-id	tag-protocol-id	inner-vlan-id	inner-tag-protocol-id
push	Optional	Optional	No	No
pop	No	No	No	No
swap	Any	Any	No	No
push-push	Optional	Optional	Optional	optional
swap-push	Optional	Optional	Any	Any
swap-swap	Optional	Optional	Any	Any
pop-swap	No	No	Any	Any
pop-pop	No	No	No	No

Table 2 indicates valid statement combinations for rewrite operations for the output VLAN map. “No” means the statement must not be included in the output VLAN map for the rewrite operation. “Optional” means the statement may be optionally specified for the rewrite operation in the output VLAN map.

Table 2: Rewrite Operations and Statement Usage for Output VLAN Maps
	Output VLAN Map Statements
Rewrite Operation	vlan-id	tag-protocol-id	inner-vlan-id	inner-tag-protocol-id
push	No	Optional	No	No
pop	No	No	No	No
swap	No	Optional	No	No
push-push	No	Optional	No	Optional
swap-push	No	Optional	No	Optional
swap-swap	No	Optional	No	Optional
pop-swap	No	No	No	Optional
pop-pop	No	No	No	No

Input VLAN Map with inner-vlan-id Statement, Output VLAN Map with Optional inner-tag-protocol-id Statement

Input VLAN Map with inner-tag-protocol-id Statement, Output VLAN Map with Optional inner-tag-protocol-id Statement

Input VLAN Map with inner-tag-protocol-id and inner-vlan-id Statements

Configuring Inner and Outer TPIDs and VLAN IDs

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