CTC Union FRM220-100AS-1, User Manual

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CHAPTER 3
PROVISIONING VIA TEXT MENU
there is no tag and therefore no 802.1p tag priority. Use this setting to set the default CoS for this
port (0 to 7).
Fiber Speed : 100AS-1 only supports 100M for the fiber port. This field is not selectable.
<S>
SFP and D/D Function : The MSA (Multi-Source Agreement) information can be displayed for
the inserted SFP module. An example is shown in 3.4.9 SFP and D/D (DDI/DOM) Functions.
3.4.8 Fiber and UTP Port Rate Limiting
100AS-1 provides per port ingress and egress rate limiting. For bandwidth settings, IRL or ingress
rate limit refers to limiting any packets coming into that switch port, while ERL or egress rate limit
refers to limiting packets leaving that port. When rate limiting is applied, ERL will use pause
commands (802.3x) when the desired rate limit is exceeded (assuming the connection is Full
Duplex), while any IRL setting will cause packets to be dropped when the limit is exceeded. This is
an important point when doing the rate limit settings. It is preferable to set ERL at each port for
the path that requires limiting so that flow control can help connected devices cope with the
limiting. If IRL is employed, a connected device which has its packets dropped without flow control,
will continue to send packets at its full rate. Also, since the packets are dropped, the application
layer must deal with the packet loss by timing out. It should be noted that for some operators,
dropping packets is preferred to using pause packets. The
100AS-1 can be flexibly used to limit
transmission using either method.
100AS-1 supports inputting any value from 64k to 990M. For example, to place an IRL on this port
at 25 megabit per second, key in the IRL as "25m". The results will be:
*********************************************
*** CTC UNION TECHNOLOGIES CO., LTD. ***
*** FRM220-100AS-1 Ver:1.005 ***
*********************************************
<< Local Fiber Status and Configuration >>
Link Status [Link Up ]
Remote Device Power [OK]
OAM Remote Loopback Test [OFF]
OAM Looped [OFF]
FEF Status [OFF]
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Select Ingress Rate Limit.(Range: 64K ~ 990M)
Ingress Rate Limit Input: ____