Configuring Eompls - Cisco 7604 Configuration Manual

Any Transport over MPLS
•
•

Configuring EoMPLS

These sections describe how to configure EoMPLS:
•
•
•
Prerequisites
Before you configure EoMPLS, ensure that the network is configured as follows:
•
•
EoMPLS works by encapsulating Ethernet PDUs in MPLS packets and forwarding them across the
MPLS network. Each PDU is transported as a single packet. Two methods are available to configure
EoMPLS in PFC3BXL or PFC3B mode:
•
•
Note •
•
PFC3BXL or PFC3B mode supports MPLS. In PFC3BXL or PFC3B mode, LAN ports can receive Layer
2 traffic, impose labels, and switch the frames into the MPLS core without using an OSM or FlexWAN
module.
In PFC3BXL or PFC3B mode, you can configure an OSM or a FlexWAN module to face the core of
MPLS network and use either the OSM configuration, the FlexWAN configuration, or the PFC3BXL or
PFC3B mode configuration. For more information, see this publication:
http://www.cisco.com/en/US/docs/routers/7600/install_config/12.2SX_OSM_config/mpls.html#Ethern
et_over_MPLS
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
24-16
EoMPLS is not supported on Layer 3 VLAN interfaces.
Point-to-point EoMPLS works with a physical interface and subinterfaces.
Prerequisites, page 24-16
Configuring PFC3BXL or PFC3B Mode VLAN-Based EoMPLS, page 24-17
Configuring PFC3BXL or PFC3B Mode Port-Based EoMPLS, page 24-19
Configure IP routing in the core so that the PE routers can reach each other through IP.
Configure MPLS in the core so that a label switched path (LSP) exists between the PE routers.
VLAN mode—Transports Ethernet traffic from a source 802.1Q VLAN to a destination 802.1Q
VLAN through a single VC over an MPLS network. VLAN mode uses VC type 5 as default (no
dot1q tag) and VC type 4 (transport dot1 tag) if the remote PE does not support VC type 5 for
subinterface (VLAN) based EoMPLS.
Port mode—Allows all traffic on a port to share a single VC across an MPLS network. Port mode
uses VC type 5.
For both VLAN mode and port mode, PFC3BXL and PFC3B mode EoMPLS does not allow local
switching of packets between interfaces unless you use loopback ports.
A system can have both an OSM or FlexWAN configuration and PFC3BXL or PFC3B mode
configuration enabled at the same time. Cisco supports this configuration but does not recommend
it. Unless the uplinks to the MPLS core are through OSM or FlexWAN-enabled interfaces, OSM or
FlexWAN-based EoMPLS connections will not be active; this causes packets for OSM or
FlexWAN-based EoMPLS arriving on non-WAN interfaces to be dropped. For information on WAN
(FlexWAN and OSM) EoMPLS, see this publication:
http://www.cisco.com/en/US/docs/routers/7600/install_config/12.2SX_OSM_config/mpls.html#Et
hernet_over_MPLS
Chapter 24 Configuring PFC3BXL and PFC3B Mode Multiprotocol Label Switching
OL-4266-08