TCAM allocation on 7220 IXR-D1
On the 7220 IXR-D1, all TCAM slices are allocated statically. The 7220 IXR-D1 does not support dynamic TCAM allocation. The 7220 IXR-D1 has 3 groups of TCAM slices associated with 3 different stages of the forwarding pipeline. Each of these groups is a separate resource pool.
TCAM allocation details for each stage are summarized in the following table.
| Stage | TCAM allocation details |
|---|---|
| VFP |
There are 4 VFP slices. Each VFP slice provides 512 entries. IPv4 capture-filter entries require a single slice of single-width entries, providing a maximum of 512 entries per slice. One bank is statically allocated, providing scaling of 512 entries. IPv6 capture-filter entries require a single slice of double-width entries, providing a maximum of 256 entries per slice. One bank is statically allocated, providing scaling of 256 entries. One bank is unused. |
| IFP |
There are 18 IFP slices. Each IFP slice provides 512 entries. Ingress IPv4 filter entries require a single slice of single-width entries, providing a maximum of 512 entries per slice. Two banks are statically allocated, providing scaling of 1024 entries. Ingress IPv6 filter entries require a triple-wide slice, providing a maximum of 512 entries per triple-wide slice. Six banks are statically allocated, providing scaling of 1024 entries. Ingress MAC filter entries require a double-wide slice, providing a maximum of 512 entries per double-wide slice. Zero banks are statically allocated. Six banks are unused. |
| EFP |
There are 4 EFP slices. Each EFP slice provides 256 entries. Egress IPv4 and IPv4 CPM filter entries require a single slice of single-width entries, providing a maximum of 256 entries per slice. One bank is statically allocated, providing scaling of 256 entries. Egress IPv6 and IPv6 CPM filter entries require a double-wide slice, providing a maximum of 256 entries per double-wide slice. Two banks are statically allocated, providing scaling of 256 entries. Egress MAC filter entries require a single-wide slice, providing a maximum of 256 entries per slice. Zero banks are statically allocated. One bank is unused. |