Users Guide

Input Statistics:
0 packets, 0 bytes
0 64-byte pkts, 0 over 64-byte pkts, 0 over 127-byte pkts
0 over 255-byte pkts, 0 over 511-byte pkts, 0 over 1023-byte pkts
0 Multicasts, 0 Broadcasts
0 runts, 0 giants, 0 throttles
0 CRC, 0 overrun, 0 discarded
Output Statistics:
0 packets, 0 bytes, 0 underruns
0 64-byte pkts, 0 over 64-byte pkts, 0 over 127-byte pkts
0 over 255-byte pkts, 0 over 511-byte pkts, 0 over 1023-byte pkts
0 Multicasts, 0 Broadcasts, 0 Unicasts
0 throttles, 0 discarded, 0 collisions, 0 wreddrops
Rate info (interval 299 seconds):
Input 00.00 Mbits/sec, 0 packets/sec, 0.00% of line-rate
Output 00.00 Mbits/sec, 0 packets/sec, 0.00% of line-rate
Time since last interface status change: 05:22:28
Optimizing Traffic Disruption Over LAG Interfaces On IOA
Switches in VLT Mode
When you use the write memory command while an Aggregator operates in VLT mode, the VLT LAG
configurations are saved in nonvolatile storage (NVS).
By restoring the settings saved in NVS, the VLT ports come up quicker on the primary VLT node and
traffic disruption is reduced. The delay in restoring the VLT LAG parameters is reduced (90 seconds by
default) on the secondary VLT peer node before it becomes operational. This makes sure that the
configuration settings of the primary VLT node are synchronized with the secondary VLT peer node
before the secondary VLT mode is up. The traffic outage is less than 200 millisconds during the restart or
switchover of the VLT peer nodes from primary to secondary.
Preserving LAG and Port Channel Settings in Nonvolatile
Storage
Use the write memory command on an I/O Aggregator, which operates in either standalone or PMUX
modes, to save the LAG port channel configuration parameters. This behavior enables the port channels
to be brought up because the configured interface attributes are available in the system database during
the booting of the device. With the reduction in time for the port channels to become active after the
switch is booted, the loss in the number of packets that are serviced by these interfaces is minimized.
Enabling the LACP link fallback member
By default, the lacp link-fallback member-independent port-channel 128 command is
enabled on the Standalone mode. This command is not available in the VLT mode. To disable the
LACP
link fallback member, use the no lacp link-fallback member-independent port-channel
128
command.
Link Aggregation
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