VLAN bandwidth increase to lower rxload?

[mikenewcomb]

So I noticed a high rxload on a L3 VLAN and raised the bandwidth to help it and it worked but I'm not sure what is really happening.

I have decent number of nodes PXE booting on VLAN XXX, but doesn't seem like too much.

#sh int vlanXXX

reliability 255/255 txload 32/255 rxload 255/255

Then I changed the bandwidth to 10000000 (10g) and see the following...

#sh int vlanXXX

reliability 255/255 txload 32/255 rxload 35/255

I know that the bandwidth doesn't actually change the load capabilities so di I really make anything better or is it just the reporting?

Nexus 9332pq, 14 2348tq's, around 100 VLAN's, overall network underutilized

[Joseph W. Doherty]

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Posting

As far as I know, it would just be a impacting you load reporting ratios.

[Carlos Villagran]

Hi!

As Joseph said, it is only impacting your reporting ratios in the show interface outputs. Of course, this is not good if you were getting high Rxload in an SVI (I assume you had 1G bandwidth number before changing it to 10G), that means you should have quite a lot traffic being punted to your CPU.

Have a nice day, best regards!

JC

[mikenewcomb]

The CPU shows a normal low other than a spike when everything is rebooted, but doesn't look unusually high. As for the reporting, I feel like it actually is allocating more resources since the load is a fractional representation and 255/255 of 1g is 1g, while 35/255 of 10g is 1.37g

[mikeleebrla]

Changing the bandwidth setting will also impact any QoS settings that may be applied on the interface using percentage.  For instance is you allocate 50% of a circuit for VOIP traffic and you double your bandwidth setting, the interface will then allow twice as much VOIP traffic on the interface.