TNETX4080 Datasheet, PDF (40/64 Pages) Texas Instruments – ThunderSWITCH IIE 8-PORT 10-/100-MBIT/S ETHERNETE SWITCH

TNETX4080
ThunderSWITCH II^™ 8-PORT 10-/100-MBIT/S ETHERNET^™ SWITCH
SPWS050A – AUGUST 1998 – REVISED NOVEMBER 1998
Start
Key:
interrupt
statistic
No
Unkmem
Known
VLAN?
Yes
UnkVLAN
No
Source Port = 1 in.
VLANnPorts?
Yes
Yes
Destination
No
Address
Found?
Yes
Destination
Locked
Bit = 1?
No
No
Destination
is
Multicast?
Yes
Destination
No
is
Multicast?
Yes
Destination
No
is
Multicast?
Yes
Source Port
Yes
Blocked by
RxUniBlockPorts
and Dest.
Nblck=0?
Source Port
Blocked by
RxMultiBlockPorts
and Dest.
Nblck=0?
Yes
Source Port
Blocked by
RxMultiBlockPorts?
Yes
Source Port
Blocked by
RxUniBlockPorts?
Yes
Source Port
Blocked by
RxMultiBlockPorts or
UnkVLAN=0?
Yes
No
Port Routing
Code = Port Code
From Records
No
Port Routing
Code = Port Vector
From Records
Set Port Routing
Code to 0
Destination
Cuplink Bit
Set?
No
Yes
Include UplinkPort
in Port
Routing Code
No
Port Routing
Code =
UnkMultiPorts
Unknown
Multicast
Destination
No
Port Routing
Code =
UnkUniPorts
Unknown
Unlcast
Destination
No
Port Routing
Code =
UnkVLANPort
AND Port Routing
Code With VLAN
VLANnPorts Code
To C
(Continued)
To A
(Continued)
To B
(Continued)
Figure 7. Frame-Routing Algorithm
40
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