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the upstream member interfaces on the PEX. The PEX will attempt to recover the connection with
the parent fabric by sending protocol control packets out of the upstream member interfaces.
Examples
# Enable PEX persistent forwarding on Layer 2 aggregate interface 1.
<Sysname> system-view
[Sysname] interface bridge-aggregation 1
[Sysname-Bridge-Aggregation1] pex persistent-forwarding
Related commands
pex local-forwarding
pex-capability enable
Use pex-capability enable to enable PEX connection capability for a Layer 2 aggregate
interface and assign the interface to a PEX group.
Use
undo pex-capability enable to disable PEX connection capability for a Layer 2
aggregate interface.
Syntax
pex-capability enable group group-id
undo pex-capability enable
Default
PEX connection capability is disabled for a Layer 2 aggregate interface.
Views
Layer 2 aggregate interface view
Predefined user roles
network-admin
Parameters
group-id: Specifies a PEX group ID. The group must exist on the device.
Usage guidelines
After PEX connection capability is enabled on a Layer 2 aggregate interface, the parent fabric and
the PEX exchange LLDP packets for neighbor discovery. After the parent fabric and the PEX finish
neighbor discovery, they send PE CSP Open requests to each other for connection establishment.
A Layer 2 aggregate interface enabled with PEX connection capability automatically operates in
dynamic aggregation mode. In addition, the system automatically configures the aggregate interface
as an edge port of the spanning tree feature for the PEX to quickly come online.
After you disable PEX connection capability on a Layer 2 aggregate interface, the aggregate
interface is automatically removed from the PEX group, and its attached PEX goes offline.
Examples
# Enable PEX connection capability on Layer 2 aggregate interface 1 and assign the interface to
PEX group 1.
<Sysname> system-view
[Sysname] interface bridge-aggregation 1
[Sysname-Bridge-Aggregation1] pex-capability enable group 1
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