Static-LAG Minimum Bandwidth Configuration
Configure the minimum bandwidth allowed for ports that must be linked up and bundled in the LACP port channel. We can configure the minimum bandwidth range from BANDWIDTH <1-999>k|m for 1 to 999 kilo bits or mega bits <1-1000>g for 1 to 1000 giga bits. If the Total bandwidth of ports aggregated to the port channel is less than the minimum Bandwidth value configured, then the port channel enters the Protocol Down because of the minimum Bandwidth state.
Note: Minimum Bandwidth should be configured the same on both sides for optimal performance.
Topology
Figure 8-10: LAG Minimum Bandwidth
SW1
#configure terminal | Enter configure mode. |
(config)#interface sa10 | Creating interface static-lag sa10 |
(config-if)#port-channel min-bandwidth 40g | Configuring port channel minimum bandwidth as 40g (range from BANDWIDTH <1-999>k|m for 1 to 999 kilo bits or mega bits <1-1000>g for 1 to 1000 giga bits.) |
(config-if)#end | Exit the configure mode |
Validation
SW1
#show static-channel-group 10
% Static Aggregator: sa10
% Minimum- 4
% Member status:
xe4/1 up
xe4/2 up
xe4/3 up
xe4/4 up
#show running-config interface sa10
!
interface sa10
switchport
bridge-group 1
switchport mode trunk
switchport trunk allowed vlan all
port-channel min-bandwidth 40g
SW2
#configure terminal | Enter configure mode. |
(config)#interface sa10 | Creating interface port-channel sa10 |
(config-if)#port-channel min-bandwidth 40g | Configuring port channel minimum bandwidth as 40g (range from BANDWIDTH <1-999>k|m for 1 to 999 kilo bits or mega bits <1-1000>g for 1 to 1000 giga bits.) |
(config-if)#exit | Exit the configure mode |
Validation
SW2
#show running-config interface sa10
!
interface sa10
switchport
bridge-group 1
switchport mode trunk
switchport trunk allowed vlan all
port-channel min-bandwidth 40g
!
#show static-channel-group 10
% Static Aggregator: sa10
% Minimum-bandwidth 40g
% Member status:
Xe50/1 up
Xe50/2 up
Xe50/3 up
Xe50/4 up
Note: When sa goes down due to [Total Bandwidth of sa] <[ Minimum Bandwidth value Configured]
SW1:
=====
#sh int brief sa10
Codes: ETH - Ethernet, LB - Loopback, AGG - Aggregate, MLAG - MLAG Aggregate
FR - Frame Relay, TUN -Tunnel, PBB - PBB Logical Port, VP - Virtual Port
CVP - Channelised Virtual Port, METH - Management Ethernet, UNK- Unknown
ED - ErrDisabled, PD - Protocol Down, AD - Admin Down,
IA - InActive
PD(Min L/B) - Protocol Down Min-Links/Bandwidth
DV - DDM Violation, NA - Not Applicable
NOM - No operational members, PVID - Port Vlan-id
Ctl - Control Port (Br-Breakout/Bu-Bundle)
HD - ESI Hold Timer Down
--------------------------------------------------------------------------------
Port-channel Type PVID Mode Status Reason Speed
Interface
--------------------------------------------------------------------------------
sa10 AGG 1 trunk down PD(Min L/B) 0
#
SW2:
=====
#sh int brief sa10
Codes: ETH - Ethernet, LB - Loopback, AGG - Aggregate, MLAG - MLAG Aggregate
FR - Frame Relay, TUN -Tunnel, PBB - PBB Logical Port, VP - Virtual Port
CVP - Channelised Virtual Port, METH - Management Ethernet, UNK- Unknown
ED - ErrDisabled, PD - Protocol Down, AD - Admin Down,
IA - InActive
PD(Min L/B) - Protocol Down Min-Links/Bandwidth
DV - DDM Violation, NA - Not Applicable
NOM - No operational members, PVID - Port Vlan-id
Ctl - Control Port (Br-Breakout/Bu-Bundle)
HD - ESI Hold Timer Down
--------------------------------------------------------------------------------
Port-channel Type PVID Mode Status Reason Speed
Interface
--------------------------------------------------------------------------------
sa10 AGG 1 trunk down PD(Min L/B) 0
#
Last modified date: 07/13/2023