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參數(shù)資料
| 型號： | TC6216M |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 16 Port 10/100 Unmanaged QoS Ethernet Switch |
| 中文描述： | 非網(wǎng)管16端口10/100以太網(wǎng)交換機的QoS |
| 文件頁數(shù)： | 14/28頁 |
| 文件大小： | 568K |
| 代理商： | TC6216M |
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TC6216M
- 14 -
Ver. 2.1
5/24/01
The QoS mechanism supports multiple prioritization sources. Packet priority can be checked via 802.1Q VLAN
Tag Header TCI bits (layer 2) and/or IP Header TOS bits (layer 3). If the value of TCI/TOS bits is “0”, this
packet will be treated as normal priority, if “1” then it will be high priority, if more than “1” then it will be very
high priority. Port based prioritization is also available.
Using port based priority the user can assign different
priorities for each port. If VLAN and IP priority are disabled or not labeled, all packets received on the same port
will be forwarded with the corresponding assigned port base priority.
When more than one prioritization
methods are active at the same time (VLAN, IP and/or port based) the priority resolution consists of maximizing
the priority class.
The QoS can be configured using both pin configuration interface and/or EEPROM settings. The VLAN
prioritization can be enabled by
EnVLPr
pin or by
PriorityReg[0]
EEPROM bit, while
EnIPPr
pin or
PriorityReg[1]
EEPROM bit can be used to enable the IP priority. Port based prioritization is available using
PrtPri(x)
and
PriLev(x)
pins for port 4 to 11, or equivalent EEPROM bits
ConfigRegPx[3]
and
ConfigRegPx[2]
for each ports. Setting
PrtPri(x)
pin to
′
1
′
will configure the corresponding port in Priority
Mode.
PriLev(x)
pin
selects between high (
′
0
′
) and very high priority (
′
1
′
).
Trunk Configuration
9
TC6216M can setup two port aggregation links, named
′
Trunk A
′
respectively
′
Trunk B
′
, of up to 4 ports each.
Using this feature multiple TC6216M can be cascaded or interconnected with other switches supporting the
trunking feature.
The trunks can be independently configured according with tables below using pin configuration
TnkA0
,
TnkA1
respectively
TnkB0 ,TnkB1
or using EEPROM configuration
(TrunkCfgReg)
.
TnkA1
′
0
′
′
0
′
′
1
′
′
1
′
TnkA0
′
0
′
′
1
′
′
0
′
′
1
′
Ports grouped within Trunk A
Trunk A disabled
Trunk A groups ports 0 and 1
Trunk A groups ports 0,1and 2
Trunk A groups ports 0,1,2 and 3
TnkB1
′
0
′
′
0
′
′
1
′
′
1
′
TnkB0
′
0
′
′
1
′
′
0
′
′
1
′
Ports grouped within Trunk B
Trunk B disabled
Trunk B groups ports 14 and 15
Trunk B groups ports 13,14 and 15
Trunk B groups ports 12,13,14 and 15
The traffic on the ports of the same trunk will be automatically balanced. TC6216M can be selected from three
balancing methods based on source port, SA and DA as shown in the table below. They are selectable from
TnkMod(0-1) pins or from EEPROM TrunkCfgReg register:
TnkMod1
′
0
′
′
0
′
′
1
′
′
1
′
TnkMod0
′
0
′
′
1
′
′
0
′
′
1
′
Method Description
Method 1.
based on source port.
Method 2.
based on SA.
Method 3.
based on SA and DA.
Not used
Different stations connected on the same port may not send traffic on the same trunk line. The packet order is
guaranteed for method 1 and 2 for unicast and broadcast packets. The packet order is guaranteed for method 3
only for unicast packets.
The default mode for all trunking ports is 100Mbps full duplex. Trunk port modes can be changed using
EEPROM settings although this is not recommended. Also it is recommended for trunk ports to be
interconnected with 100Mbps full duplex capable ports only. If the user selects a trunk configuration it must
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