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Chapter 6: Configuring SSR Bridging
Configuring the Bridging Mode of Ports
You can configure ports to use either of the following bridging modes. Each port has a
Layer-2 lookup table where MAC address or flows are stored. A port's bridging mode
determines the contents of each Layer-2 table entry. A port can use only one type of
bridging at a time.
•
Flow-based bridging
If a port is configured for flow-based bridging, each Layer-2 table entry contains
entries consisting of a source MAC address, destination MAC address, and VLAN ID.
•
Address-based bridging
If a port is configured for address-based bridging (the default), each Layer-2 table entry
contains a unique destination MAC address and VLAN ID.
Suppose that a port on the SSR is connected to a hub that is connected to three
workstations, A, B, and C. If each workstation is talking to one another and sending
broadcast traffic, the Layer-2 table on the SSR's port would contain the following entries
for the workstations (assume that the VLAN ID is 1 for all entries):
Table 7. Bridging modes
Flow-based bridging
Address-based bridging
66
Port Configuration
Entries
•
MAC addresses A->B
•
MAC addresses A->C
•
MAC addresses B->A
•
MAC addresses B->C
•
MAC addresses C->A
•
MAC addresses C->B
•
MAC addresses A->broadcast
•
MAC addresses B->broadcast
•
MAC addresses C->broadcast
•
MAC address A
•
MAC address B
•
MAC address C
•
MAC broadcast address
CoreWatch User's Manual
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