06-11-2015 10:13 AM
On a 9372, when I configure ARP suppression under the NVE interface I get the following message:
int nve1
member vni 10000
suppress-arp
Warning: Please configure TCAM region for Ingress ARP-Ether ACL for ARP supression to work.
The configuration guide lists a command: hardware access-list tcam region arp-ether 256
Tried this but the switch returned an error indicating not enough resources are available.
06-16-2015 10:42 AM
Hi
You need to free up the TCAM slices to allocate resources for arp-ether acl
Do "show run all | inc tcam" and try to free up the tcams for those which you do not need for your environment.
On my set up, I am not using vacl and so I am setting the allocation to 0 and freeing it for arp-ether.
For eg:
VXLAN-E11# show run all | inc vacl
hardware access-list tcam region vacl 512
hardware access-list tcam region ipv6-vacl 0
hardware access-list tcam region mac-vacl 0
If you are not using vacl, then you can set it to zero as shown below.
VXLAN-E11(config)# hardware access-list tcam region vacl 0
Warning: Please save config and reload the system for the configuration to take effect
VXLAN-E11(config)# hardware access-list tcam region arp-ether 256
Warning: Please save config and reload the system for the configuration to take effect
VXLAN-E11(config)#
Save & Reload
Verify that the allocation for arp-ether has taken effect once the switch comes up.
VXLAN-E11# show run all | inc arp-ether
hardware access-list tcam region arp-ether 256
VXLAN-E11#
Now you should be able to configure arp suppression for the L2VNI under nve interface.
Regards
Santhosh
06-26-2015 07:03 AM
Thanks Santhosh. Do you know if this is a requirement on all N9K switches or just on specific models?
06-29-2015 10:43 AM
For now, based on my understanding tcam allocation for arp-ether is a requirement on all N9K switches for configuring arp suppression. But freeing up tcam slices is based on the tcam allocations configured on your set up. Hope this helps.
-Santhosh
06-08-2021 06:17 AM
I found this old post as I was trying to configure VXLAN on GNS3 with Nexus 9500v images.
What I did to use it, is this:
hardware access-list tcam region racl 512 hardware access-list tcam region arp-ether 256 double-wide
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