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Version 6.2 131 December 2010
SIP Release Notes 2. Supported Features
• EFM:
♦ ITU G.991.2 Annex E for Ethernet, also known as EFM or 2Base-TL, as
defined in IEEE 802.3ah
♦ Up to 8 IP interfaces for EFM/2Base-TL
♦ IP QoS classification, Marking, scheduling and shaping
♦ 802.1Q VLANs
5. Routing protocols:
• Static routing
• RIPv1 - RFC 1058
• RIPv2 - RFC 2453
• OSPFv2 - RFC 2328
• BGPv4 - RFC 1771 and RFC 2858
• BGP Extended Community Attribute for BGP/MPLS VPNs
• Policy-based routing (e.g. DSCP-based and BGP policy routing)
6. Network Address Translation (NAT/NAPT):
• ACL-like classification with ALG support
• Source and destination-based IP addresses ACLs
• Multiple NAT and NAPT WAN addresses
7. WAN access via PPPoE, PPTP, L2TP, DHCP.
8. Quality of service (QoS):
• Traffic Classification and Marking:
♦ Connection-based (with SPI) or packet-based classification.
♦ VoIP classification for both SIP signaling and media traffic: tracking UDP
ports selected by SDP offer-answer negotiations.
♦ Explicit classification criteria:
Source/destination MAC and IP addresses
Protocol (ALG-based)
L4 port numbers
DSCP/802.1p
Length of packets or their data portion only
♦ DSCP and 802.1p marking
• Traffic scheduling and shaping:
♦ Ingress traffic policing
♦ Traffic reservation - when not utilized, other classes are served with extra
bandwidth
♦ Maximum egress traffic shaping
♦ Scheduling: Strict Priority, Fair, Weighted Round-Robin Queuing, and Class-
Based WRR Queuing
♦ Queue management:
RED
TCP Serialization Reduction to minimize jitter in VoIP environments