Fore Systems forerunner series, Configuration Manual

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ForeRunner ATM Switch Network Configuration Manual
MPOA
4.3.4.1 MPS Configuration
The network administrator must configure each MPS with the site-specific IP address match-
ing the gateway address being used by LEC/MPCs in its ELAN.
The MPS on each PowerHub 7000 is configured as follows:
1. For each LANE/MPOA virtual port, specify an ELAN name. The LECS configura-
tion must also be updated to allow the MPS to join these ELANs.
2. For each LANE/MPOA virtual port, specify an IP address.
3. Enable LANE/MPOA support.
4. Enable routing.
5. Save the configuration and reboot the MPS if necessary to make the changes
effective.
Router table information need not be configured. The MPS will instead gather this informa-
tion through routing protocol exchanges with other MPS’s.
4.3.4.2 Initialization
When its host boots, each LEC/MPC automatically goes through the following sequence to
establish a connection to the MPS.
1. The LEC/MPC registers via ILMI with the switch to which it is attached.
2. The LEC/MPC connects to an LECS to which it sends its own ATM address and
the name of the ELAN it wishes to join (the ELAN name is an empty string unless
the LEC/MPC has been site-configured with an ELAN name). The LEC/MPC also
supplies a LANE 1.0 compliant parameter identifying itself as an MPOA-aware
client.
3. Next, the LEC/MPC receives the following from the LECS:
- the name of the ELAN to which it is assigned
- the ATM address of the LES for the ELAN it is joining
- the parameters containing the flow detection and shortcut establishment poli-
cies it is to use
4. The LEC/MPC then connects to its assigned LES, and provides the LES with a
parameter identifying itself as MPOA-aware.
5. Finally, the LEC/MPC connects to the ELAN’s BUS.
Once the LANE/MPOA connections are established, third-party network-layer protocol driv-
ers on the host can establish network-layer connectivity. The methods these upper-layer driv-
ers use to determine host IP addresses, default gateway, and backup gateway addresses vary
depending on the third-party product. For example, the LANE/MPOA driver itself permits
these drivers to use BOOTP or DHCP to obtain IP configuration information.