IP178G datasheet(28/76 Pages) ETC2

28 / 76 page

IP178G

Data Sheet

28 / 76

December 19, 2012

IP178G-DS-R01.3

4.7.3.3

TCP/UDP logical port priority

IP178G can configure the ingress port frame priority by using the TCP/UDP frame logical port number.

When the incoming IP packet with TCP or UDP protocols, the 16 bits destination or source port field in

the TCP/UDP header can be used for assign the frame priority. It means the source’s logical port or the

destination’s logical port in the incoming packet match any of the pre-defined logical ports, the incoming

frame will give a high priority mark and put it in the high priority queue.

TCP/UDP logical port priority function of all ports is enabled if pin 48 COS_DIS is pulled high. The logical

port priority of each pre-defined port number or user defined range of logical port number can be enabled

individually by programming the corresponding bit in the MII register 20.14[5:0].

Table 5 TCP/UDP logical port priority table

Pre-defined logical ports list

Service

TCP

Description

SSH

secure shell

HTTPs

443

secure HTTP (SSL)

RDP

3389

Windows Remote Desktop Protocol

XWIN

6000

X11 – used for X-Windows

When the “LPP_AGING_EN (MII register 20.14[15:8])” function enable, once receive a IP frame with

TCP/UDP protocol and the logical port number is the pre-defined port number, the ingress port will treat

as a port based high priority port for 300 seconds. After the internal timer expired, the ingress port will

change back to previous behavior

These pre-defined logical ports can be enable individually by programming MII register 20.14[3:0] or

EEPROM register 10[3:0].

User defined range logical ports list (defaulting setting)

Service

TCP

Description

telnet

Remote terminal protocol

VNC

5800

VNC remote desktop protocol

For the user defined range logical ports, it contains two set of range and can be changed by

programming via MII register or EEPROM register. Each range consists of a high and low limit register to

set the TCP or UDP logical port range. The high limit port number can not large than the low limit port

number. The default logical port number of range 0 and 1 are default set to 23 and 5800, for this case the

high and low limit port number is the same value. If an incoming IP frame with TCP/UDP port number is

between the low and high limit, it will be treated as a high priority frame.

4.8

Port Mirroring

There are some circumstances that the network administrator requires to monitor the network

status. The port mirroring function can help the network administrator diagnose the network.

A port mirroring function can be accomplished through assigning 1 to 7 monitored ports and a

snooping port. The IP178G supports four kinds of monitoring methods: RX(ingress), TX(egress),

RX-and-TX, and RX-or-TX. This function can be enabled by programming the corresponding bit in MII

registers 20.3 ~ 20.4.

For example, if designer wants to monitor the output traffic of port5 and port4 as shown in the

following figure. He has to write “2’b01” to register 20.3[14:13] to choose monitor method to be TX traffic,

write 0x30 to registers 20.4[7:0] to select port5 and port4 to be monitored ports, write 1’b1 and 3’b000 to

registers 20.3[15] and 20.4[15:13] to select port0 as a monitoring port. IP178G will copy tx traffic of port5

and port4 to port0.

IP178G Datasheet(PDF) 28 Page - List of Unclassifed Manufacturers

IP178G Datasheet(HTML) 28 Page - List of Unclassifed Manufacturers

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76

Datasheet Download

Link URL