Configuring Pseudowire Headend; Pwhe Configuration Restrictions; Configuring Pwhe Interfaces - Cisco CRS Configuration Manual

Implementing Multipoint Layer 2 Services
end - Prompts user to take one of these actions:
• Yes - Saves configuration changes and exits the configuration session.
• No - Exits the configuration session without committing the configuration changes.
• Cancel - Remains in the configuration mode, without committing the configuration changes.

Configuring Pseudowire Headend

The PWHE is created by configuring interface pw-ether or pw-iw. For the PWHE to be functional, the xconnect
has to be configured completely. Configuring other layer 3 (L3) parameters, such as VRF and IP addresses,
are optional for the PWHE to be functional. However, the L3 features are required for the layer 3 services to
be operational; that is, for PW L3 termination.
This section describes these topics:

PWHE Configuration Restrictions

These configuration restrictions are applicable for PWHE:
• Up to 4096 PWHE interfaces (a combination of pw-ether and pw-iw).
• Up to eight interface lists per peer.
• Up to eight L3 links per interface list.
• VLAN ID (tag-impose) can be configured only in xconnects which have pw-ether interfaces.
• VLAN ID (tag-impose) can only be configured under VC type 4 pw-ether interfaces.
• Interface lists can be configured on CRS only.
• Interface lists can accept POS, GigabitEthernet, TenGigabitEthernet, SRP, Bundle Ethernet and Bundle
• No support for features such as pseudowire redundancy, preferred path, local switching or L2TP for
• Ethernet and VLAN transport modes are not allowed for pw-iw xconnects.
• Address family, Cisco Discovery Protocol (CDP) and MPLS configurations are not allowed on PWHE
• IPv6 configuration is not allowed under pw-iw interfaces.

Configuring PWHE Interfaces

Perform this task to configure PWHE interfaces, that is, to attach the generic interface list with a PWHE
interfaces.
POS; other interfaces are rejected.
xconnects configured with PWHE.
interfaces.
Cisco IOS XR Virtual Private Network Configuration Guide for the Cisco CRS Router, Release 6.1.x
Configuring Pseudowire Headend
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