HPE FlexNetwork HSR6800 series Configuration Manual page 52

Neighbor state : two way
Neighbor aged time : 12
The output indicates that both GigabitEthernet 3/0/1 and GigabitEthernet 3/0/2 are in
Advertisement state, which means both links are bidirectional.
# Enable system information monitoring on Router A, and enable the display of log and trap
information.
[RouterA] quit
<RouterA> terminal monitor
<RouterA> terminal logging
<RouterA> terminal trapping
The following log and trap information is displayed on Router A:
<RouterA>
#Jan 18 17:36:18:798 2010 RouterA DLDP/1/TrapOfUnidirectional: -Slot=2; Trap
1.3.6.1.4.1.255062.43.2.1.1 : DLDP detects a unidirectional link in port 17825792.
%Jan 18 17:36:18:799 2010 RouterA IFNET/3/LINK_UPDOWN: GigabitEthernet3/0/1 link
status is DOWN.
%Jan 18 17:36:18:799 2010 RouterA DLDP/3/DLDP_UNIDIRECTION_AUTO: -Slot=2; DLDP
detects a unidirectional link on port GigabitEthernet3/0/1. The transceiver has
malfunction in the Tx direction or cross-connected links exist between the local device
and its neighbor. The shutdown mode is AUTO. DLDP shuts down the port.
#Jan 18 17:36:20:189 2010 RouterA DLDP/1/TrapOfUnidirectional: -Slot=2; Trap
1.3.6.1.4.1.255062.43.2.1.1 : DLDP detects a unidirectional link in port 17825793.
%Jan 18 17:36:20:189 2010 RouterA IFNET/3/LINK_UPDOWN: GigabitEthernet3/0/2 link
status is DOWN.
%Jan 18 17:36:20:190 2010 RouterA DLDP/3/DLDP_UNIDIRECTION_AUTO: -Slot=2; DLDP
detects a unidirectional link on port GigabitEthernet3/0/2. The transceiver has
malfunction in the Tx direction or cross-connected links exist between the local device
and its neighbor. The shutdown mode is AUTO. DLDP shuts down the port.
%Jan 15 16:54:56:040 2010 RouterA DLDP/3/DLDP_UNIDIRECTION_AUTO_ENHANCE: -Slot=2; In
enhanced DLDP mode, port GigabitEthernet3/0/1 cannot detect its aged-out neighbor.
The transceiver has malfunction in the Tx direction or cross-connected links exist
between the local device and its neighbor. The shutdown mode is AUTO. DLDP shuts down
the port.
The output indicates that the link status of both GigabitEthernet 3/0/1 and GigabitEthernet 3/0/2
is down, and DLDP has detected a unidirectional link on both ports and has automatically shut
them down.
Assume that in this example, the unidirectional links are caused by cross-connected fibers.
Correct the fiber connections on detecting the unidirectional link problem. As a result, the ports
shut down by DLDP automatically recover, and Router A displays the following log information:
<RouterA>
%Jan 18 17:47:33:869 2010 RouterA IFNET/3/LINK_UPDOWN: GigabitEthernet3/0/1 link
status is UP.
%Jan 18 17:47:35:894 2010 RouterA IFNET/3/LINK_UPDOWN: GigabitEthernet3/0/2 link
status is UP.
The output indicates that the link status of both GigabitEthernet 3/0/1 and GigabitEthernet 3/0/2
is now up.
45