Avaya SG203 Manuel D’Utilisation

Data authenticity is assured by using HMAC-MD5™ or HMAC-SHA-1 
packet signatures to reject altered or forged packets. All security 
mechanisms employed by the security gateway conform to IPSec 
standards, in order to provide interoperability and broaden the use of VPN 
technology.

For maximum network flexibility, the SG203 security gateway supports 
four 10/100BASE-T Ethernet interfaces, and the SG208 supports four 10/
100/1000BASE-T Ethernet interfaces.

When packets are encrypted and authenticated according to IPSec 
protocol guidelines, additional bytes, in the form of IPSec headers, must 
be added to packets. In many cases, the additional packet overhead 
imposes a performance penalty in return for security. The extra bytes tend 
to lengthen packets and reduce the throughput (measured in packets per 
second). The overhead depends on the IPSec policy and could be up to 
63 bytes.

3000

8000

12,000

16,000

2

1

200,000

300,000

100/3000

100/8000

50/300

100/1000

3000

8000