Brocade Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide (Supporting R05.6.00) - Manual (Page 484)

460 Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide
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Configuring VPLS instances
3
Single tag to single tag packet tag handling into or from the MPLS uplink with raw-pass-through
mode with ports configured as untagged.
Using the raw pass through option enables the user to configure the VC mode to interoperate
between third party devices. The raw pass through option allows the user to:
1. Select the raw-pass-through mode which behaves like a tagged mode when all endpoints
are configured as tagged endpoints.
2. Select the raw mode which behaves like an untagged mode when all endpoints are
configured as untagged endpoints.
3. Select raw mode when all endpoints are configured as untagged endpoints even though
the peers continue to signal the PW VC -type as raw mode.
Difference in behavior between devices
TABLE 67 Difference in behavior between devices
Behavior Brocade MLX and NetIron XMR NetIron CES and NetIron CER
QoS Command
Configuration QoS Commands must be configured at egress
interface. QoS Commands must be configured
at Ingress interface.
Carrying PCP end to end
in raw-pass-through
mode The qos pcp encode-policy off command must
be configured at VPLS end point interface. The user must:
1
Configure qos pcp
encode-policy off at ingress PE
for VPLS end point interface.
2 Configure qos pcp
encode-policy off at the egress
PE for MPLS interface.
Carrying DSCP end to
end in raw-pass-through
mode By Default DSCP is carried end to end. Configure the extended-qos-mode at
the egress PE.
Carrying both PCP and
DSCP end to end in
raw-pass-through mode The qos pcp encode-policy off command must
be configured at VPLS end point interface. The user must:
Configure qos pcp encode-policy off
at ingress PE for VPLS end point
interface.
Configure extended-qos-mode at
egress PE.
Figure 67 describes the behavioral differences of the Brocade devices.