Juniper JUNOS 10.1 - CONFIGURATION GUIDE 1-2010 Configuration Manual page 736

JUNOS 10.1 Network Interfaces Configuration Guide
NOTE: On IQ2 and IQ2-E interfaces and MX Series interfaces, when a VLAN tag is
pushed, the inner VLAN IEEE 802.1p bits are copied to the IEEE bits of the VLAN or
VLANs being pushed. If the original packet is untagged, the IEEE bits of the VLAN or
VLANs being pushed are set to 0.
Stacking and Rewriting Gigabit Ethernet VLAN Tags
You can configure rewrite operations to stack (
tags on single-tagged frames and dual-tagged frames. If a port is not tagged, rewrite
operations are not supported on any logical interface on that port.
You can configure the following VLAN rewrite operations:
You configure VLAN rewrite operations for logical interfaces in the input VLAN map
for incoming frames and in the output VLAN map for outgoing frames. To configure
the input VLAN map, include the
To configure the output VLAN map, include the
You can include both statements at the following hierarchy levels:
666
Stacking and Rewriting Gigabit Ethernet VLAN Tags
—Remove a VLAN tag from the top of the VLAN tag stack. The outer VLAN
pop
tag of the frame is removed.
pop-pop —For Ethernet IQ2 and IQ2-E interfaces, remove both the outer and
inner VLAN tags of the frame.
pop-swap —For Ethernet IQ2 and IQ2-E interfaces, remove the outer VLAN tag
of the frame, and replace the inner VLAN tag of the frame with a user-specified
VLAN tag value. The inner tag becomes the outer tag in the final frame
—Add a new VLAN tag to the top of the VLAN stack. An outer VLAN tag is
push
pushed in front of the existing VLAN tag.
push-push —For Ethernet IQ2 and IQ2-E interfaces, push two VLAN tags in front
of the frame.
—For Ethernet IQ2 and IQ2-E interfaces, replace the outer VLAN tag
swap-push
of the frame with a user-specified VLAN tag value. A user-specified outer VLAN
tag is pushed in front. The outer tag becomes an inner tag in the final frame.
swap-swap —For Ethernet IQ2 and IQ2-E interfaces, replace both the inner and
the outer VLAN tags of the incoming frame with a user-specified VLAN tag value.
input-vlan-map {
...interface-specific configuration...
}
output-vlan-map {
...interface-specific configuration...
}
[edit interfaces interface-name unit logical-unit-number]
push ), remove (
statement:
input-vlan-map
output-vlan-map
pop ), or rewrite ( swap )
statement: