Configuring Inner and Outer TPIDs and VLAN IDs
For some rewrite operations, you must configure the inner or outer TPID values and inner or outer VLAN ID values. These values can be applied to either the input VLAN map or the output VLAN map.
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:
You can include this 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:
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:
You can include these statements at the following hierarchy levels:
- [edit interfaces interface-name unit logical-unit-number]
- [edit logical-systems logical-system-name interfaces interface-name unit logical-unit-number]
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 ether-options ethernet-switch-profile tag-protocol-id [ tpids ]] hierarchy level.
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 |
The following examples use Table 1 and Table 2 and show how the pop-swap operation can be configured in an input VLAN map and an output VLAN map:
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
