3com S7906E Installationsanweisungen
1-12
To do…
Use the command…
Remarks
Enable active/standby mode for
service ports on SRPUs
service ports on SRPUs
strict-standby enable
Optional
Disabled by default.
z
Before enabling the active/standby mode for service ports on SRPUs, you need to perform
cross-card port redundancy configurations, such as cross-card port aggregation, cross-card STP,
cross-card dynamic routing.
z
This feature is applicable to SRPUs LSQ1SRP2XB and LSQ1SRP12GB only.
Configuring the Traffic Forwarding Mode of SRPUs
Introduction to SRPU traffic forwarding mode
The S7900E series Ethernet switches support multiple types of SRPUs, which support different traffic
forwarding modes. You can configure the SRPU traffic forwarding mode as needed.
Table 1-1 Traffic forwarding modes supported by S7900E SRPUs
SRPU model
Supported
traffic
forwarding
mode
Feature
Recommended
application
environment
Enhanced
Layer 2
forwarding
mode
Layer 2
forwarding
mode
Supporting selective QinQ
Double-tagged VLAN
networks
networks
LSQ1SRP2XB
LSQ1SRPB
LSQ1MPUA
LSQ1CGP24TS
C
C
LSQ1CGV24PS
C
C
LSQ1SRPD
LSQ1SRP12GB
Standard
forwarding
mode
forwarding
mode
z
Supporting QinQ
z
Powerful Layer 3 forwarding
functions
functions
Common networks
Enhanced
Layer 2
forwarding
mode with the
MAC extension
function
Layer 2
forwarding
mode with the
MAC extension
function
z
Supporting selective QinQ
z
Providing a 128K MAC address
table and a 4K routing table
table and a 4K routing table
Double-VLAN-tag
networks with a large
quantity of MAC
addresses
networks with a large
quantity of MAC
addresses
LSQ1SRP1CB
Standard
forwarding
mode with the
MAC extension
function
forwarding
mode with the
MAC extension
function
z
Supporting QinQ
z
Powerful Layer 3 forwarding
functions
functions
z
Providing a 128K MAC address
table and a 4K routing table
table and a 4K routing table
Networks having a
large quantity of
MAC addresses and
low requirements on
routing table size
large quantity of
MAC addresses and
low requirements on
routing table size