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Beginner

NLB command not working

Hello I want to configure NLB on Nexus 5672UP, version 7.1(4)N1(1)

Routing is done on FW, where I don´t have access, but

 

regarding this thread: https://communities.cisco.com/thread/21313?db=5

 

I hope, it should be okay.

 

I find out this document about configuration NLB:

https://www.cisco.com/c/en/us/support/docs/ip/multicast/116150-configure-Nexus7000-00.html#anc5

 

I think best option for me is  2A, I provided this steps:

 

interface Vlan10
  no shutdown
  ip arp 10.1.2.200 03bf.0000.1111

but problem is in second step:(I cannot apply: layer-2 multicast lookup mac ---> Invalid command)

vlan configuration 10
  layer-2 multicast lookup mac

Here you can see what I can apply:

 

image.png

 

is there any option to skip this step or can I skip it ?, or why I cannot apply this command, should I do something before apply?

 

Thank you very much.

 

 

3 REPLIES 3
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Cisco Employee

Re: NLB command not working

Hi,

 

The NLB configuration document you've referenced was written specifically for the Nexus 7000 - The command "layer-2 multicast lookup mac" does not apply to the Nexus 5600 platform. The "equivalent" workaround for this would be to tell the Nexus 5Ks where to send packets with that multicast MAC address:

 

Example:

 

 

mac address-table static 03bf.0000.1111 vlan 10 interface Ethernet1/1 Ethernet1/2 Ethernet1/3 Ethernet1/4

Here's my example setup for this:

 

5K NLB.png

 

Hope that helps!

 

- Andrea

 

- Andrea, CCIE #56739 R&S
Highlighted
Beginner

Re: NLB command not working

Hello, thank you very much for your answer, 

 

In your command are 4 interfaces eth1-4, I guess, two of them are between N5k, am I right? and please why?

 

And what do you think, is this configuration for NLB enough if I have L3 on fw?

 

On fw I have only IP on vlan interface

 

On N5Ks I have this configuration:

interface Vlan10
  no shutdown
  ip arp 10.1.2.200 03bf.0000.1111

mac address-table static 003bf.0000.1111 vlan 10 interface Ethernet1/1 Ethernet1/2 Ethernet1/3 Ethernet1/4

 

Thank you 

Highlighted
Beginner

Re: NLB command not working

How about the igmp mutlicast mac: 0100.5e?  Should use the command igmp snooping static to config, or mac address-table static ?  Please comment. Thanks a lot.

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