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Replies

help with TCAM reallocation for Nexus n3k

Jeffrey_233
Beginner
Beginner

Hi All

I've never done a TCAM reallocation.
I'm a bit stuck on what I should be reallocating to where I need it allocated to.
And trying to add more acl rules, I'm getting the tcam is full.

I've got a pair of n3k in a VPC.
I use a few object-groups, copp-system and primarily ip access-lists.
Internal network configuration only.
They are not external facing I have a firewall for all the NATing.

I would think that i would need to allocate more vacl but according to my utilization report I'm not even using it and it's the ingress SUP that's low.
Could someone help and explain?

 

 

 

# show hardware profile tcam region 
         sup size =   48 
        vacl size =  640 
       ifacl size =  400 
         qos size =  192 
        span size =    0 
        racl size = 1536 
      e-racl size =  256 
      e-vacl size =  640 
      qoslbl size =    0 
        ipsg size =    0 
      arpacl size =    0 
   ipv6-racl size =    0 
 ipv6-e-racl size =    0 
    ipv6-sup size =    0 
    ipv6-qos size =    0 
       e-qos size =   64 
         pbr size =    0 
    ipv6-pbr size =    0 
  e-ipv6-qos size =    0 
   e-mac-qos size =    0 
  e-qos-lite size =    0 
 mcast-bidir size =    0 
   ipv6-span size =    0 
ipv6-span-l2 size =    0 
         nat size =  256 
       rbacl size =    0 
        copp size =   64 
         fhs size =    0 
     Unknown size =    0 
arp-storm-acl size =    0 
         svi size =    0 
# show hardware access-list resource utilization 

slot  1
=======



INSTANCE 0x0
-------------


         ACL Hardware Resource Utilization (Mod 1)
         ----------------------------------------------------------
                                        Used    Free    Percent 
                                                        Utilization
------------------------------------------------------------------- 
Ingress IFACL                           0       400     0.00   
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
Ingress RACL                            522     1014    33.98  
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
Ingress VACL                            0       640     0.00   
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
Ingress SUP                             44      4       91.66  
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
Ingress QOS IPV4                        2       190     1.04   
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
Egress Racl                             0       256     0.00   
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
Egress QoS                              49      15      76.56  
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
Ingress COPP - Egr SUP                  49      15      76.56  
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
Egress VACL                             0       640     0.00   
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
Ingress NAT                             0       256     0.00   
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00
                                        0               0.00

LOU                                     2       29      6.45   
Both LOU Operands                       2       
Single LOU Operands                     0       
LOU L4 src port:                        0
LOU L4 dst port:                        2
LOU L3 packet len:                      0
LOU IP tos:                             0
LOU IP dscp:                            0
LOU ip precedence:                      0
LOU ip TTL:                             0
TCP Flags                               0       16      0.00   
L4 op labels, Tcam 0                    0       63      0.00   
L4 op labels, Tcam 2                    8       55      12.69  
L4 op labels, Tcam 6                    1       62      1.58   

Ingress Dest info table                 0       512     0.00   
Egress Dest info table                  0       512     0.00   

 

 

 

 

1 Accepted Solution

Accepted Solutions

Charlie Moreton
Cisco Employee
Cisco Employee
3 Replies 3

Any command we will discuss here remember' later you maybe need to return to modify it.

Now

Tcam total size is fix' 

We need more room for acl so we need to reduce room of other feature.

Select feature that you dont use it' reduce it room

Then you will get free room to enlarge acl tcam.

MHM

Charlie Moreton
Cisco Employee
Cisco Employee

This question would have greater visibility in the Switching forum: https://community.cisco.com/t5/switching/bd-p/6016-discussions-lan-switching-routing

Jeffrey_233
Beginner
Beginner
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