Cisco SGE2000 - Cisco - Gigabit Switch - Tcam Allocation

Managing Device Information
TCAM Utilization
Cisco Small Business SFE/SGE Managed Switches Administration Guide 31
2
TCAM Allocation
Application Per
Port/
Per
Device
Allocation
on
Activation
Application
Upper Limit
TCAM rules per User ACL Comments
QoS
Advanced
Mode rules
Port 6/device No limit 1 or 2 TCAM entries per each rule. Feature is activated
by default.
Access
Control
Rules
Port 6/device No limit 1 or 2 TCAM entries per each rule. Feature is activated
by default.
PVE Port 2/port or
LAG
--- --- Feature is activated
by default.
Allocation done only
during initialization.
IP Subnet
VLAN
Port 0 255 2 or 4 Rules are duplicated
for both IP and MAC
based VLANs.
Protocol
Based VLAN
Port 0 No limit 1 or 2 Rules are duplicated
for both IP and MAC
based VLANs.
MAC Based
VLAN
Port 0 432 1 or 2 Rules are duplicated
for both IP and MAC
based VLANs.
DHCP
Snooping
Device 2/device No limit 8 TCAM entries/1 DHCP Snooping rule
IP Source
Guard
Port 0 No limit 1 TCAM entry/1 IP Source Guard entry
ARP
Inspection
Device 2/device 128 4 TCAM entries/1 ARP Inspection rule
VLAN Rate
Limiting
Both 0 255 1 global rule/1 VLAN Rate Limit.
Additional rule is created for each
“permit” rule on the interface.