Dear All,
I would like to allocate some TCAM for arp-supression via this command:
hardware access-list tcam region arp-ether 256
I have read the TCAM Carving Guide, but it doesn't explain what impact turning off another TCAM region may have.
In my case, "ing-l2-span-filter" sounds like a reasonable feature to turn off but could anyone clarify what "ing-l2-span-filter" does?
switch# sho run all | in tcam
hardware access-list tcam region ing-racl 1792
hardware access-list tcam region ing-l2-qos 256
hardware access-list tcam region ing-l3-vlan-qos 512
hardware access-list tcam region ing-sup 512
hardware access-list tcam region ing-l2-span-filter 256
hardware access-list tcam region ing-l3-span-filter 256
hardware access-list tcam region span 512
hardware access-list tcam region egr-racl 1792
hardware access-list tcam region egr-sup 256
[Everything else is 0]
The feature does not appear to be used:
switch# show hardware access-list resource utilization
slot 1
=======
INSTANCE 0x0
-------------
ACL Hardware Resource Utilization (Mod 1)
----------------------------------------------------------
Used Free Percent
Utilization
-------------------------------------------------------------------
Ingress L2 SPAN ACL 0 256 0.00
Ingress L2 SPAN ACL IPv4 0 0.00
Ingress L2 SPAN ACL IPv6 0 0.00
Ingress L2 SPAN ACL MAC 0 0.00
Ingress L2 SPAN ACL ALL 0 0.00
Ingress L2 SPAN ACL OTHER 0 0.00
[...]
Ingress L3/VLAN SPAN ACL 0 256 0.00
Ingress L3/VLAN SPAN ACL IPv4 0 0.00
Ingress L3/VLAN SPAN ACL IPv6 0 0.00
Ingress L3/VLAN SPAN ACL MAC 0 0.00
Ingress L3/VLAN SPAN ACL ALL 0 0.00
Ingress L3/VLAN SPAN ACL OTHER 0 0.00
[...]
SPAN 0 512 0.00
SPAN IPv4 0 0.00
SPAN IPv6 0 0.00
SPAN MAC 0 0.00
SPAN ALL 0 0.00
SPAN OTHER 0 0.00
[...]
INSTANCE 0x1
-------------
ACL Hardware Resource Utilization (Mod 1)
----------------------------------------------------------
Used Free Percent
Utilization
-------------------------------------------------------------------
Ingress L2 SPAN ACL 0 256 0.00
Ingress L2 SPAN ACL IPv4 0 0.00
Ingress L2 SPAN ACL IPv6 0 0.00
Ingress L2 SPAN ACL MAC 0 0.00
Ingress L2 SPAN ACL ALL 0 0.00
Ingress L2 SPAN ACL OTHER 0 0.00
[...]
Ingress L3/VLAN SPAN ACL 0 256 0.00
Ingress L3/VLAN SPAN ACL IPv4 0 0.00
Ingress L3/VLAN SPAN ACL IPv6 0 0.00
Ingress L3/VLAN SPAN ACL MAC 0 0.00
Ingress L3/VLAN SPAN ACL ALL 0 0.00
Ingress L3/VLAN SPAN ACL OTHER 0 0.00
[...]
SPAN 0 512 0.00
SPAN IPv4 0 0.00
SPAN IPv6 0 0.00
SPAN MAC 0 0.00
SPAN ALL 0 0.00
SPAN OTHER 0 0.00
I would rather know what I'm losing before I turn off a feature. Thanks for any guidance.
