SIP User's Manual 262 Document #: LTRT-12804
Mediant 800 MSBG
3.3.3.4.5 Configuring 802.1p Settings
The IEEE 802.1p priority marking method is a standard for prioritizing network traffic at the
data link/Mac sub-layer. 802.1p traffic is simply classified and sent to the destination, with
no bandwidth reservations established. The 802.1p header includes a 3-bit prioritization
field, which allows packets to be grouped into eight levels of priority (0-7), where level 7 is
the highest. In addition, the device maps these eight levels to priority queues, where
Queue 0 has the lowest priority. The device's QoS supports up to eight queues. By default,
the higher the level and queue values, the higher priority they receive. Therefore, the more
critical the traffic, the higher priority level and queue number it should receive.
¾ To change the mapping between a priority value and a queue value:
1. Click the 802.1p Settings item (Configuration tab > Data menu > QoS submenu >
802.1p Settings); the following page appears:
Figure 3-172: Configuring 802.1p Settings
2. From the corresponding drop-down list, select the desired level.
3. Click OK.
3.3.3.5 VPN
The VPN menu allows you to configure Virtual Private Networking (VPN) over the Internet,
and includes the following items:
IPSec (see ''Configuring IPsec'' on page 262)
PPTP (see ''
Configuring PPTP Server'' on page 265)
L2TP (see ''
Configuring L2TP Server'' on page 266)
3.3.3.5.1 Configuring IPSec
Internet Protocol Security (IPSec) is a series of guidelines for the protection of Internet
Protocol (IP) communications. It specifies procedures for securing private information
transmitted over public networks. The IPSec protocols include:
AH (Authentication Header) provides packet-level authentication.
ESP (Encapsulating Security Payload) provides encryption and authentication.
IKE (Internet Key Exchange) negotiates connection parameters, including keys for the
other two services.
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