Juniper ACX1000 Configuration Manual page 1321

Copyright © 2017, Juniper Networks, Inc.
NOTE: ACX Series routers do not support the
NOTE: For a single VLAN or VPLS routing instance, you can include either
the or the
vlan-id
a vlan-id or vlan-tags
packets received are forwarded to the outbound Layer 2 interface without
having the VLAN tag modified unless an
the Layer 2 interface. This results in a frame being forwarded to a Layer 2
interface with a VLAN tag that is different from what is configured for the
Layer 2 interface. Note that a frame received from the Layer 2 interface is still
required to match the VLAN tag(s) specified in the interface configuration.
The invalid configuration may cause a Layer 2 loop to occur. In ACX5048 and
ACX5096 routers, if the interface VLAN is configured as
mandatory to normalize the VPLS routing instance.
in ACX5048 and ACX5096 routers.
The VLAN tags associated with the inbound logical interface are compared with the
normalizing VLAN identifier. If the tags are different, they are rewritten as described in
Table 48 on page 758. The source MAC address of a received packet is learned based on
the normalizing VLAN identifier.
If the VLAN tags associated with the outbound logical interface and the normalizing
VLAN identifier are different, the normalizing VLAN identifier is rewritten to match the
VLAN tags of the outbound logical interface, as described in
The following steps outline the process for bridging a packet received over a Layer 2
logical interface when you specify a normalizing VLAN identifier using either the
or statement for a VLAN or a VPLS routing instance:
number vlan-tags
When a packet is received on a physical port, it is accepted only if the VLAN identifier
1.
of the packet matches the VLAN identifier of one of the logical interfaces configured
on that port.
The VLAN tags of the received packet are then compared with the normalizing VLAN
2.
identifier. If the VLAN tags of the packet are different from the normalizing VLAN
identifier, the VLAN tags are rewritten as described in
If the source MAC address of the received packet is not present in the source MAC
3.
table, it is learned based on the normalizing VLAN identifier.
The packet is then forwarded toward one or more outbound Layer 2 logical interfaces
4.
based on the destination MAC address. A packet with a known unicast destination
MAC address is forwarded only to one outbound logical interface. For each outbound
Layer 2 logical interface, the normalizing VLAN identifier configured for the VLAN or
VPLS routing instance is compared with the VLAN tags configured on that logical
Chapter 35: Configuring Virtual Private LAN Service
statement, but not both. If you do not configure
vlan-tags
for the VLAN or the VPLS routing instance, the Layer 2
output-vlan-map
hierarchy.
[edit logical-systems]
is configured on
, it is
vlan-id-list
is not supported
vlan-id all
Table 49 on page 758.
vlan-id
Table 48 on page 758.
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