SNR S2989G-48TX-DC — настройка и устранение неполадок Ethernet и ERPS [431/553]

S2989G-24TX Operation Manual

Chapter 7 Reliability Configuration

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Switch(config-If-Ethernet1/0/1)#ulsm group 1 downlink

Switch(config-If-Ethernet1/0/1)#exit

Switch(Config)#interface ethernet 1/0/3

Switch(config-If-Ethernet1/0/3)#ulsm group 1 uplink

Switch(config-If-Ethernet1/0/3)#exit

SwitchC configuration task list:

Switch(Config)#ulsm group 1

Switch(Config)#interface ethernet 1/0/2

Switch(config-If-Ethernet1/0/2)#ulsm group 1 downlink

Switch(config-If-Ethernet1/0/2)#exit

Switch(Config)#interface ethernet 1/0/4

Switch(config-If-Ethernet1/0/4)#ulsm group 1 uplink

Switch(config-If-Ethernet1/0/4)#exit

7.4.4

ULSM Troubleshooting

 With the normal configuration, if the downlink port does not responds the down event

of the uplink port, please enable the debug function of ULSM, copy the debug

information of 3 minutes and the configuration information, and send them to our

technical service center.

7.5

ERPS

7.5.1

Introduction to ERPS

ERPS (Ethernet Ring Protection Switching) is a kind of layer2 anti-ring protocol which

is defined by ITU-T; the standard number is ITU-T G.8032/Y1344, also known as G.8032.

G.8032 Ethernet standard absorbs the advantages of the ring network protection

technology of EAPS, RPR, SDH, STP.etc. It optimizes the detection mechanism and it can

detect the two-way/single-way fault, support the structure with multi-ring and multi-domain.

At the same time of achieving rotating of 50ms, it supports the master and slave and load

sharing. It becomes the newest standard of the Ethernet ring technology.

ERPS is the anti-ring protocol used in ring network protection. It includes: link

switching in loop fault, notification and loop rotating after loop restored, but it does not

include the discovery of link fault. The CCM function defined by 802.1ag protocol can be

used in fault discovery and the physical link fault detection can also be used. The principle