Concept Guide

3 Change the default timer.
UPLINK-STATE-GROUP mode
defer-timer seconds
Dell(conf)#uplink-state-group 1
Dell(conf-uplink-state-group-1)#defer-timer 20
Dell(conf-uplink-state-group-1)#show config
!
uplink-state-group 1
downstream TenGigabitEthernet 0/1-32
upstream Port-channel 128
defer-timer 20
Conguring Uplink Failure Detection (PMUX mode)
To congure UFD, use the following commands.
1 Create an uplink-state group and enable the tracking of upstream links on the switch/router.
CONFIGURATION mode
uplink-state-group group-id
•
group-id: values are from 1 to 16.
To delete an uplink-state group, use the no uplink-state-group group-id command.
2 Assign a port or port-channel to the uplink-state group as an upstream or downstream interface.
UPLINK-STATE-GROUP mode
{upstream | downstream} interface
For interface, enter one of the following interface types:
• 10 Gigabit Ethernet: enter tengigabitethernet {slot/port |slot/port-range}
• 40 Gigabit Ethernet: enter fortygigabitethernet {slot/port |slot/port-range}
• Port channel: enter port-channel {1-512 | port-channel-range}
Where port-range and port-channel-range specify a range of ports separated by a dash (-) and/or individual ports/port
channels in any order; for example:
upstream gigabitethernet 1/1-2,5,9,11-12
downstream port-channel 1-3,5
• A comma is required to separate each port and port-range entry.
To delete an interface from the group, use the no {upstream | downstream} interface command.
3 (Optional) Congure the number of downstream links in the uplink-state group that will be disabled (Oper Down state) if one upstream
link in the group goes down.
UPLINK-STATE-GROUP mode
downstream disable links {number | all}
• number: species the number of downstream links to be brought down. The range is from 1 to 1024.
• all: brings down all downstream links in the group.
The default is no downstream links are disabled when an upstream link goes down.
To revert to the default setting, use the no downstream disable links command.
4 (Optional) Enable auto-recovery so that UFD-disabled downstream ports in the uplink-state group come up when a disabled upstream
port in the group comes back up.
Uplink Failure Detection (UFD)
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