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Eserver
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Table 3-2 Interpartition VLAN communication
Communication with external networks
The Shared Ethernet Adapter is configured with PVID 1 and VLAN 10. This
means that untagged packets that are received by the Shared Ethernet Adapter
are tagged for VLAN 1. Handling of outgoing traffic depends on the VLAN tag of
the outgoing packets.
Packets tagged with the VLAN which matches the PVID of the Shared
Ethernet Adapter are untagged before being sent out to the external network
Packets tagged with a VLAN other than the PVID of the Shared Ethernet
Adapter are sent out with the VLAN tag unmodified.
In our example, Partition 1 and Partition 2 have access to the external network
through network interface en0 using VLAN 1. As these packets are using the
PVID the Shared Ethernet Adapter will remove the VLAN tags before sending the
packets to the external network.
Partition 1 and Partition 3 have access to the external network using network
interface en1 and VLAN 10. This packets are sent out by the Shared Ethernet
Adapter with the VLAN tag; therefore, only VLAN capable destination devices will
be able to receive the packets. Table 3-3 lists this relationship.
Table 3-3 VLAN communication to external network
3.3.2 Virtual Ethernet connections
Virtual Ethernet connections supported in POWER5 systems use VLAN
technology to ensure that the partitions can only access data directed to them.
VLAN
Partition / Network interface
1
Partition 1 / en0
Partition 2 / en0
2
Partition 3 / en0
Partition 4 / en0
10
Partition 1 / en1
Partition 3 / en1
VLAN
Partition / Network interface
1
Partition 1 / en0
Partition 2 / en0
10
Partition 1 / en1
Partition 3 / en1
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