Configuring An Update Delay For Local Mpls Labels; Flushing The Suboptimal Bgp Route To The Rib - HP HPE FlexNetwork 7500 series Configuration Manual

Step
3. Configure BGP to protect an
EBGP peer or peer group
when the memory usage
reaches level 2 threshold.
To configure BGP to protect an EBGP peer or peer group when the memory usage reaches level 2
threshold (IPv6 unicast/multicast address family):
Step
1. Enter system view.
2. Enter BGP instance view or
BGP-VPN instance view.
3. Configure BGP to protect an
EBGP peer or peer group
when the memory usage
reaches level 2 threshold.

Configuring an update delay for local MPLS labels

BGP includes local MPLS labels in advertised VPNv4 routes, VPNv6 routes, labeled IPv4 unicast
routes, and labeled IPv6 unicast routes.
When a local label is changed, BGP removes the old label and advertises the new label. Traffic
interruption occurs if BGP peers use the old label to forward packets before they learn the new label.
To resolve this issue, configure an update delay for local MPLS labels. BGP does not remove the old
label before the update delay timer expires.
To configure an update delay for local MPLS labels:
Step
1. Enter system view.
2. Enter BGP instance view.
3. Configure an update delay for
local MPLS labels.

Flushing the suboptimal BGP route to the RIB

This feature flushes the suboptimal BGP route to the RIB when the following conditions are met:
•
The optimal route is generated by the network command or is redistributed by the
import-route command.
•
The suboptimal route is received from a BGP peer.
Command
peer { group-name | ipv4-address
[ mask-length ] }
low-memory-exempt
Command
system-view
•
Enter BGP instance view:
bgp as-number [ instance
instance-name ]
•
Enter BGP-VPN instance
view:
a. bgp as-number
[ instance
instance-name ]
b. ip vpn-instance
vpn-instance-name
peer { group-name | ipv6-address
[ prefix-length ] }
low-memory-exempt
Command
system-view
bgp as-number [ instance
instance-name ]
retain local-label retain-time
291
Remarks
By default, BGP periodically tears
down an EBGP session to release
memory resources when level 2
threshold is reached.
Remarks
N/A
N/A
By default, BGP tears down an
EBGP session to release memory
resources periodically when level
2 threshold is reached.
Remarks
N/A
N/A
By default, the update delay is 60
seconds.