User's Manual

171 | Network Configuration Parameters Dell Networking W-Series ArubaOS 6.4.x| User Guide
Execute the following command to enable pre-emption:
(host)(config-tunnel-group)#preemptive-failover
Following is a sample configuration:
(host)(config) #tunnel-group tgroup1
(host)(config-tunnel-group)# tunnel 10
(host)(config-tunnel-group)# tunnel 20
(host)(config-tunnel-group)#preemptive-failover
Execute the following command to view the operational status of a tunnel-group and its members:
(host)(config-tunnel-group)#show tunnel-group tgroup1
Tunnel-Group Table Entries
--------------------------
Tunnel Group Tunnel Group Id Preemptive Failover Active Tunnel Id Tunnel Members
------------ --------------- -------------------- ---------------- --------------
tgroup1 16385 enabled 10 20
Execute the following command to view the operational status of all the configured tunnel-groups:
(host)(config) #show tunnel-group
Tunnel-Group Table Entries
--------------------------
Tunnel Group Tunnel Group Id Preemptive Failover Active Tunnel Id Tunnel Members
------------ --------------- -------------------- ---------------- --------------
tgroup1 16385 enabled 0 10 20
tgroup2 16387 enabled 40 20 40 10
tgroup3 16386 enabled 0 20
Execute the following command to view the datapath Tunnel-Group table entries:
(host) #show datapath tunnel-group
Datapath Tunnel-Group Table Entries
-----------------------------------
Tunnel-Group Active Tunnel Members
------------ ------------- -------------------
16387 11 11
Jumbo Frame Support
Jumbo frames are the data frames that are larger than 1500 bytes and includes the Layer 2 header and Frame
Check Sequence (FCS). Jumbo frames functionality can be configured on W-7200 Series controllers to support
up to 9216 bytes of payload.
In centralized deployments, frames that are more than 1500 bytes in size are generated from AP to the
controller during encryption and enabling AMSDU. Therefore, whenever the AP associates to the controller,
jumbo frames are used to get the highest network performace. If this functionality is not supported, the data
frames gets fragmented, which reduces the overall throughput of the network and makes the network slow.
ArubaOS supports jumbo frames between 11ac APs and W-7200 Series controllers only.
You can enable the jumbo frame support in the following scenarios:
l Tunnel node: In a tunneled node deployment, the wired clients connected on the tunneled nodes can send
and receive the jumbo frames.
l L2/L3 GRE tunnels: When you establish a GRE tunnel between two controllers, the clients on one controller
can send and receive jumbo frames from the clients on the other controller on enabling jumbo frames.
l Between wired clients: In a network where clients connect to the controller with jumbo frames enabled
ports can send and receive the jumbo frames.