UniDirectional Link Detection Protocol – UDLD
SW1#sh udld fa0/18 Interface Fa0/18 --- Port enable administrative configuration setting: Disabled Port enable operational state: Disabled Current bidirectional state: Unknown
Configuration
SW1(config)#interface fastEthernet 0/18
SW1(config-if)#udld port aggressive
Vérification
SW1#show udld fa0/18 Interface Fa0/18 --- Port enable administrative configuration setting: Enabled / in aggressive mode Port enable operational state: Enabled / in aggressive mode Current bidirectional state: Unknown Current operational state: Advertisement Message interval: 7 Time out interval: 5 No neighbor cache information stored
Configuration Bidirectionnel
SW2#conf t
SW2(config)#int fa 0/18
SW2(config-if)#udld port aggressive
SW1#show udld fa0/18 Interface Fa0/18 --- Port enable administrative configuration setting: Enabled / in aggressive mode Port enable operational state: Enabled / in aggressive mode Current bidirectional state: Bidirectional Current operational state: Advertisement - Single neighbor detected Message interval: 7 Time out interval: 5 Entry 1 --- Expiration time: 44 Cache Device index: 1 Current neighbor state: Bidirectional Device ID: CAT0742X0UJ Port ID: Fa0/18 Neighbor echo 1 device: CAT1013N35D Neighbor echo 1 port: Fa0/18 Message interval: 15 Time out interval: 5 CDP Device name: SW2
Recovery
SW1#conf t
SW1(config)#errdisable recovery cause udld
SW1(config)#errdisable recovery interval 180
SW1#show errdisable recovery ErrDisable Reason Timer Status ----------------- -------------- arp-inspection Disabled bpduguard Disabled channel-misconfig Disabled dhcp-rate-limit Disabled dtp-flap Disabled gbic-invalid Disabled l2ptguard Disabled link-flap Disabled mac-limit Disabled link-monitor-failure Disabled loopback Disabled oam-remote-failure Disabled pagp-flap Disabled port-mode-failure Disabled psecure-violation Disabled security-violation Disabled sfp-config-mismatch Disabled storm-control Disabled udld Enabled unicast-flood Disabled vmps Disabled Timer interval: 180 seconds Interfaces that will be enabled at the next timeout: