CTC Union FRM220-100AS-1, Руководство пользователя

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CHAPTER 3
PROVISIONING VIA TEXT MENU
3.4.10.2 UTP Negotiation
By changing the negotiation setting from 'Auto' to 'Manual', the additional menu items 3 & 4 are
revealed.
<3>
Speed : The UTP port supports 10 or 100 forced configuration speed.
<4>
Duplex : The UTP port supports Full or Half-Duplex forced operation modes.
Settings on this page must be confirmed, when prompted, by pressing the 'S' key. It is at this point
that they also actually become active in the switch of
100AS-1 .
3.4.10.3 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 the switch port, while ERL or egress rate limit
refers to limiting packets leaving the port. When rate limiting is applied, ERL will use pause
commands (802.3x) when the desired rate limit is exceeded, while any IRL setting will cause packet
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 can only 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.
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*** CTC UNION TECHNOLOGIES CO., LTD. ***
*** FRM220-100AS-1 Ver:1.005 ***
*********************************************
<< Local UTP Status and Configuration >>
Link Status [Link Up ]
Speed [100M]
Duplex [Full]
<1> :Port Active [Enable ]
<2> :Negotiation [Manual]
<3> :Speed [10M]
<4> :Duplex [Half]
<5> :Ingress Rate Limit [Unlimited]
<6> :Egress Rate Limit [Unlimited]
<7> :Default Port CoS [0]
<S> :Confirm and Save Settings(Port Active, Speed, Duplex and
Negotiation).
<ESC>:Go to Previous Menu.