Dell Force10 E300, Configuration Manual

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Service Provider Bridging | 967
To map C-Tag dot1p values to S-Tag dot1p values and mark the frames accordingly:
Layer 2 Protocol Tunneling
Layer 2 Protocol Tunneling (L2PT) is supported on platforms:
c e s
L2PT is supported on E-Series ExaScale
e
x
with FTOS 8.2.1.0. and later.
Spanning Tree BPDUs use a reserved destination MAC address called the Bridge Group Address, which is
01-80-C2-00-00-00. Only spanning-tree bridges on the LAN recognize this address and process the BPDU.
When VLAN stacking is used to connect physically separate regions of a network, BPDUs attempting to
traverse the intermediate network might be consumed and subsequently dropped because the intermediate
network itself might be using Spanning Tree (
Figure 46-13 ).
Step Task Command Syntax Command Mode
1 Allocate CAM space to enable queuing
frames according to the C-Tag or the
S-Tag.
vman-qos
: mark the S-Tag dot1p and
queue the frame according to the original
C-Tag dot1p. This method requires half as
many CAM entries as
vman-qos-dual-fp
.
vman-qos-dual-fp
: mark the S-Tag dot1p
and queue the frame according to the
S-Tag dot1p. This method requires twice
as many CAM entries as
vman-qos
and
FP blocks in multiples of 2.
cam-acl l2acl
number
ipv4acl
number
ipv6acl
number
ipv4qos
number
l2qos
number
l2pt
number
ipmacacl
number
ecfmacl
number {
vman-qos
|
vman-qos-dual-fp
} number
Default: 0 FP blocks for vman-qos and
vman-qos-dual-fp
CONFIGURATION
2 The new CAM configuration is stored in
NVRAM and takes effect only after a save
and reload.
copy running-config startup-config
reload
EXEC Privilege
3 Map C-Tag dot1p values to a S-Tag dot1p
value. C-Tag values may be separated by
commas, and dashed ranges are permitted.
Dynamic Mode CoS overrides any Layer 2
QoS configuration in case of conflicts.
vlan-stack dot1p-mapping c-tag-dot1p
values
sp-tag-dot1p
value
INTERFACE
Note: Since
dot1p-mapping
marks
and
queues packets, the only remaining applicable QoS configuration
is rate metering. You may use Rate Shaping or Rate Policing.