New Software Features in Cisco IOS XE Release 3.17
The following features are introduced in Cisco IOS Release 3.17.
Multicast VPN Extranet Support
The Multicast VPN Extranet Support feature enables service providers to distribute IP multicast content originated from one enterprise site to other enterprise sites.
This feature enables service providers to offer the next generation of flexible extranet services, helping to enable business partnerships between different enterprise VPN customers.
For more information, see IP Multicast: PIM Configuration Guide, Cisco IOS XE Release 3S (Cisco ASR 900 Series).
Layer 3 Access Control Lists on EVCs
Access Control Lists (ACLs) provide the capability to filter packets at a fine granularity. In Metro Ethernet networks, ACLs are directly applied on Ethernet virtual circuits (EVCs). Earlier, the layer 3 ACLs were only supported on the routed ports (physical ports or BDIs). Effective Cisco IOS-XE Release 3.17, the support of layer 3 ACLs on EVCs provides the capability to filter the layer 3 packets on layer 2 bridges that support Ethernet services.
For more information, see MPLS: Layer 3 VPNs Configuration Guide.
VLAN Translation with QoS
Effective Cisco IOS-XE Release 3.17, VLAN translation provides flexibility in managing VLANs and Metro Ethernet-related services. The current implementation of the feature allows one or more 802.1Q tags to be replaced with other 802.1Q tags and thus the desired tag manipulation can be achieved. In a scenario with two EFPs egressing the same interface, each EFP can have a different VLAN rewrite operation, which is more flexible.
For more information, see Carrier Ethernet Configuration Guide.
Transparent CFM on C-VLAN
Transparent CFM is a mechanism to provide transparency on CFM frames between customer ends. Transparency helps the service provider network to pass the entire maintenance levels (0-7) of CFM frames from one customer end to another customer end by UP MEP that is configured on UNI-N port at any level.
For more information, see Carrier Ethernet Configuration Guide.
Ethernet Fault Detection
Ethernet Fault Detection (EFD) is a mechanism that allows Ethernet OAM protocols, such as CFM, to control the “line protocol” state of an interface. Unlike many other interface types, Ethernet interfaces do not have a line protocol, whose state is independent from that of the interface. For Ethernet interfaces, this role is handled by the physical-layer Ethernet protocol itself, and therefore if the interface is physically up, then it is available and traffic can flow.
EFD changes this to allow CFM to act as the line protocol for Ethernet interfaces. This allows CFM to control the interface state so that if a CFM defect (such as AIS or loss of continuity) is detected with an expected peer MEP, the interface can be shut down. This not only stops any traffic flowing, but also triggers actions in any higher-level protocols to route around the problem.
For more information, see Carrier Ethernet Configuration Guide.
SLM/DMM over VPLS
Synthetic loss measurement (SLM) and Delay Measurement Message (DMM) are part of the ITU-T Y.1731 standard. SLM is used to periodically measure Frame Loss and Forward Loss Ratio (FLR) between a pair of point to point MEPs. DMM is used to periodically measure Frame Delay and Frame Delay Variation between a pair of point to point MEPs.This feature enables the configuration of SLM/DMM over VPLS.
For more information, see IP SLAs Configuration Guide, Cisco IOS XE Release 3S (Cisco ASR 900).
BGP PIC Support for TDM Pseudowires
Starting Cisco IOS XE Release 3.17, BGP PIC is supported for TDM pseudowires on the ASR 900 RSP1 module.
For information, see