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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 24 Configuring QoS
Configuring Quality of Service (QoS)
TCAM with ACL
The scalability of ACLs will change depending on the features configured on the Cisco ASR 901 Router.
With on-demand allocation, ACLs can be allocated up to a maximum of 1536 TCAM rules. For more
information on troubleshooting scalability, see Troubleshooting Tips, page 24-81.
Configuration Examples for ACL
The following is a sample output of the show ip access-lists tcam command.
Router# show ip access-lists tcam1
!consumes 1 TCAM entry per rule + a default rule.
!4 TCAM entries in this case]
Extended IP access list tcam1
10 permit ip host 1.1.1.12 any
20 deny ip host 2.2.2.11 any
30 permit ip host 1.1.1.13 any
Router#
Router# show run int gig 0/1
Building configuration...
Current configuration : 221 bytes
!
interface GigabitEthernet0/1
no ip address
ip access-group tcam1 in
negotiation auto
Router# show platform tcam detailed
Ingress : 6/8 slices, 1536/2048 entries used
Pre-Ingress: 3/4 slices, 768/1024 entries used
Egress : 0/4 slices, 0/512 entries used
Slice ID: 1
Stage: Pre-Ingress
Mode: Single
Entries used: 29/256
Slice allocated to: Layer-2 Classify and Assign Group
Slice ID: 4
Stage: Pre-Ingress
Mode: Double
Entries used: 11/128
Slice allocated to: L2CP
Slice ID: 2
Stage: Ingress
Mode: Double
Entries used: 27/128
Slice allocated to: L2 Post-Switch Processing Group
Slice ID: 5
Stage: Ingress
Mode: Single
Entries used: 4/256
Slice allocated to: Port ACLs
Slice ID: 7
Stage: Ingress
Mode: Double
Entries used: 10/128