H3c-technologies H3C SecPath F5020 Uživatelský manuál stáhnout pdf (Strana 11)

IRF functionality

Network topology

A security device IRF fabric can only use the daisy-chain topology. The device does not support the full

mesh or ring topology. For information about connecting IRF member devices, see "Connecting IRF

ysical interfaces."

Simplified topology

Devices in an IRF fabric appear as one node. For redundancy and load balancing, a downstream or

upstream device can connect to the IRF fabric through a multichassis link aggregation. Together with link

aggregation, IRF creates a loop-free Layer 2 network. The spanning tree feature is not needed among

devices in the IRF fabric or on the link aggregations. IRF also simplifies the Layer 3 network topology

because it reduces the number of routing peers.

The network topology does not change when a device is added to or removed from the IRF fabric.

For example, Device A and Device B are M9000 security gateways that form a two-chassis IRF fabric, as

shown in Figure 2. T

he fabric has four MPUs (one active and three standbys), and two times the number

of interface cards that a single device provides. The IRF fabric manages the physical and software

resources of Device A and Device B in a centralized manner.

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H3c-technologies H3C SecPath F5020 Uživatelský manuál Strana 11