SNR S2940-8G-v2, Configuration Manual

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SNR S2940-8G-v2 Switch Configuration Guide
ULDP Function Configuration
SWITCH A
SWITCH B
1/0/1
1/0/2
1/0/3
SWITCH C
Figure 6.2: One End of Each Fiber Not Connected
The ULDP of switches recognizes remote devices and check the correctness of link connec-
tions via interacting ULDP messages. When ULDP is enabled on a port, protocol state machine
will be started, which means different types of messages will be sent at different states of the state
machine to check the connection state of the link by exchanging information with remote devices.
ULDP can dynamically study the interval at which the remote device sends notification messages
and adjust the local TTL (time to live) according to that interval. Besides, ULDP provides the reset
mechanism, when the port is disabled by ULDP, it can check again through reset mechanism.
The time intervals of notification messages and reset in ULDP can be configured by users, so that
ULDP can respond faster to connection errors in different network environments.
The premise of ULDP working normally is that link works in duplex mode, which means ULDP
is enabled on both ends of the link, using the same method of authentication and password.
6.2 ULDP Configuration Task Sequence
1. Enable ULDP function globally
2. Enable ULDP function on a port
3. Configure aggressive mode globally
4. Configure aggressive mode on a port
5. Configure the method to shut down unidirectional link
6. Configure the interval of Hello messages
7. Configure the interval of Recovery
8. Reset the port shut down by ULDP
9. Display and debug the relative information of ULDP
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