5812-DS01-R datasheet(73/84 Pages) BOARDCOM

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Advance Data Sheet

BCM5812

3/11/03

B roa dcom Co rpo rat ion

Document

5812-DS01-405-R

Packet Performance

Page 65

PACKET PERFORMANCE

IPSEC

Table 28 shows in-system performance for the BCM5812, in Mbps, for 3DES encryption with HMAC-SHA-1 authentication

and different data packet sizes. Performance was measured using contiguous data packets (i.e., one input fragment and

one output fragment descriptor). Each MCR had 64 packet descriptors for packet sizes up to 1024 bytes, 16 packet

descriptors for packet sizes 1400, and 2048, and 4 packet descriptors for the two largest sizes. Different keys (i.e., Security

Associations) were used on a per packet basis. Performance is given for both inbound (decrypt) and outbound (encrypt)

directions.

Table 28 shows the in-system performance for AES under the same conditions. Each MCR had 64 packet descriptors for

packet sizes up to 512 bytes, 16 packet descriptors for packet sizes 1024, 1400, and 2048, and 4 packet descriptors for the

two largest sizes.

Table 27: BCM5812 3DES IPSec Performance by Packet SIze

PCI

Width

(bits)

PCI

Clock

(MHz)

DIrection

Packet Sizes (Bytes)

128

256

304

512

1024

1400

2048

5120

10240

Outbound

Inbound

4043

576163

Table 28: BCM5812 AES IPSec Performance by Packet SIze

PCI

Width

(bits)

PCI

Clock

(MHz)

DIrection

Packet Sizes (Bytes)

128

256

304

512

1024

1400

2048

5120

10240

Outbound

Inbound

4650

747983

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