TNETX4080 datasheet(40/64 Pages) TI1

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TNETX4080

ThunderSWITCH II™ 8-PORT 10-/100-MBIT/S ETHERNET™ SWITCH

SPWS050A – AUGUST 1998 – REVISED NOVEMBER 1998

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

Unknown

Multicast

Destination

Start

Known

VLAN?

Source Port = 1 in.

VLANnPorts?

Yes

Destination

Address

Found?

Yes

Unkmem

Key:

interrupt

Yes

UnkVLAN

Destination

Multicast?

Destination

Multicast?

Yes

Destination

Locked

Bit = 1?

Source Port

Blocked by

RxUniBlockPorts

and Dest.

Nblck=0?

Yes

Source Port

Blocked by

RxMultiBlockPorts

and Dest.

Nblck=0?

Source Port

Blocked by

RxMultiBlockPorts?

Yes

Source Port

Blocked by

RxUniBlockPorts?

Destination

Multicast?

Yes

Source Port

Blocked by

RxMultiBlockPorts or

UnkVLAN=0?

Port Routing

Code = Port Code

From Records

Port Routing

Code = Port Vector

From Records

Port Routing

Code =

UnkMultiPorts

Port Routing

Code =

UnkUniPorts

Port Routing

Code =

UnkVLANPort

AND Port Routing

Code With VLAN

VLANnPorts Code

Include UplinkPort

in Port

Routing Code

Destination

Cuplink Bit

Set?

To A

(Continued)

To B

(Continued)

Yes

statistic

Unknown

Unlcast

Destination

Set Port Routing

Code to 0

To C

(Continued)

Figure 7. Frame-Routing Algorithm

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