How to reduce/load balance Bandwidth utilization on a Single Link between two Core Switch.

[Paul11]

Hi, Please advice on How to reduce/load balance Bandwidth utilization on a Single Link between two Core Switch?

[Ravisekar__Raja]

Static grouping configuration is simple.. If you have 4 ports from core1 are connected to core2. Lets take example as ports 40 to 44. (40 is the master port of the group that means after enabling sharing , any changes on port 40 will change the config on that group ports41-44)

enable sharing 40 grouping 40-44

Additionally if you want to set algorithm for loadsharing you can add few more in the above command

enable sharing 40 grouping 40-44 algorithm address-based/port based

These all for static sharing , if you want to enable LACP mode you can do as below

enable sharing 40 grouping 40-44 LACP

[Ravisekar__Raja]

Hello Yan Linn,

Sample config for vrrp. In the configuration I am creating two vlans , vlan9 and vlan10 and then going to run VRRP between them

Core1
create vlan vlan9 tag 9
conf vlan vlan9 ipaddress 192.168.9.11/24
conf vlan vlan9 add ports XXX
create vlan vlan10 tag 10
conf vlan vlan10 ipaddress 192.168.10.11/24
conf vlan vlan10 add ports XXX
create vrrp vlan vlan10 vrid 1
create vrrp vlan vlan9 vrid 1
configure vrrp vlan vlan10 vrid 1 add 192.168.10.10
configure vrrp vlan vlan9 vrid 1 add 192.168.9.10
enable vrrp vlan vlan10 vrid 1
enable vrrp vlan vlan9 vrid 1

Core 2
create vlan vlan9 tag 9
conf vlan vlan9 ipaddress 192.168.9.10/24
conf vlan vlan9 add ports XXX
create vlan vlan10 tag 10
conf vlan vlan10 ipaddress 192.168.10.10/24
conf vlan vlan10 add ports XXX
create vrrp vlan vlan10 vrid 1
configure vrrp vlan vlan10 vrid 1 priority 255
create vrrp vlan vlan9 vrid 1
configure vrrp vlan vlan9 vrid 1 priority 255
configure vrrp vlan vlan10 vrid 1 add 192.168.10.10
configure vrrp vlan vlan9 vrid 1 add 192.168.9.10
enable vrrp vlan vlan10 vrid 1
enable vrrp vlan vlan9 vrid 1

From this configuration core 2 act as default gateway for both vlans since priority in core 2 is set higher than core 1. If you want to load balance for vlan 9 you can configure higher priority in core1 and leave the priority to the default value(100). Below is the output from show commands

core1
sh vrrp
Virtual Master
VLAN Name VRID Pri IP Address State MAC Address TP/TR/TV/P/T
vlan10(En) 0001 100 192.168.10.10 BKUP 00:00:5e:00:01:01 0 0 0 Y 1
vlan9(En) 0001 100 192.168.9.10 BKUP 00:00:5e:00:01:01 0 0 0 Y 1

En-Enabled, Ds-Disabled, Pri-Priority, T-Advert Timer, P-Preempt
TP-Tracked Pings, TR-Tracked Routes, TV-Tracked VLANs

Core2

sh vrrp
Virtual Master
VLAN Name VRID Pri IP Address State MAC Address TP/TR/TV/P/T
vlan10(En) 0001 255 192.168.10.10 MSTR 00:00:5e:00:01:01 0 0 0 Y 1
vlan9(En) 0001 255 192.168.9.10 MSTR 00:00:5e:00:01:01 0 0 0 Y 1

[Paul11]

Hi Ravisekar,

Please kindly provide the sample configuration commands. Thanks!

[Ravisekar__Raja]

Hello Yan Linn Aung,

1 If you are running VRRP, you can load share the master and backup between the cores.

For example

For odd vlan tag you can have core1 as master and for even vlan tag you can have core2 as master

2 You can group the ports between the core