Ports; Port Types - Alcatel-Lucent 7750 Configuration Manual

Ports

Port Types

Before a port can be configured, the slot must be provisioned with a card type and MDA type .
The Alcatel-Lucent routers support the following port types:
•
7750 SR Interface Configuration Guide
Ethernet — Supported Ethernet port types include:
→ Fast Ethernet (10/100BASE-T)
→ Gigabit (1000BASE-T)
→ 10Gigabit Ethernet (10GBASE-X) ports on an appropriate MDA.
Router ports must be configured as either access, hybrid or network. The default is
network.
→ Access ports — Configured for customer facing traffic on which services are
configured. If a Service Access Port (SAP) is to be configured on the port or channel,
it must be configured as an access port or channel. When a port is configured for
access mode, the appropriate encapsulation type must be configured to distinguish the
services on the port or channel. Once a port has been configured for access mode, one
or more services can be configured on the port or channel depending on the
encapsulation value.
→ Network ports — Configured for network facing traffic. These ports participate in the
service provider transport or infrastructure network. Dot1q is supported on network
ports.
→ Hybrid ports — Configured for access and network facing traffic. While the default
mode of an Ethernet port remains network, the mode of a port cannot be changed
between the access/network/hybrid values unless the port is shut down and the
configured SAPs and/or interfaces are deleted. Hybrid ports allow a single port to
operate in both access and network modes. MTU of port in hybrid mode is the same as
in network mode except for the 10/100 MDA. The default encap for hybrid port mode
is dot1q; it also supports QinQ encapsulation on the port level. Null hybrid port mode
is not supported. Hybrid mode on the is not supported.
Once the port is changed to hybrid, the default MTU of the port is changed to match
the value of 9212 bytes currently used in network mode (higher than an access port);
this is to ensure that both SAP and network VLANs can be accommodated. The only
exception is when the port is a 10/100 fast Ethernet. In those cases, the MTU in hybrid
mode is set to 1522 bytes, which corresponds to the default access MTU with QinQ,
which is larger than the network dot1q MTU or access dot1q MTU for this type of
Ethernet port. The configuration of all parameters in access and network contexts will
Interface Configuration
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