Dell EMC SmartFabric OS10 User Guide Release 10.5.0

Configure uplink failure detection

Consider the following before configuring an uplink-state group:

• An uplink-state group is considered to be operationally up if it has at least one upstream interface in the Link-Up state.
• An uplink-state group is considered to be operationally down if it has no upstream interfaces in the Link-Up state.
• You can assign a physical port or a port channel to an uplink-state group.
• You can assign an interface to only one uplink-state group at a time.
• You can designate the uplink-state group as either an upstream or downstream interface, but not both.
• You can configure multiple uplink-state groups and operate them concurrently.
• You cannot assign both a port channel and its members to an uplink-state group, which would make the group inactive. The port channels and individual ports that are not part of any port channel can coexist as members of an uplink-state group.
• If one of the upstream interfaces in an uplink-state group goes down, you can set the downstream ports in an operationally down state with an UFD Disabled error status. You can configure the system to disable either a user-configurable set of downstream ports or all the downstream ports in the group.
• The downstream ports are disabled in order starting from the lowest numbered port to the highest numbered port.
• When an upstream interface in an uplink-state group that was down comes up, the set of UFD-disabled downstream ports that were down due to that particular upstream interface are brought up, and the UFD Disabled error clears in those downstream ports.
• If you disable an uplink-state group, the downstream interfaces are not disabled, regardless of the state of the upstream interfaces.
• If you do not assign upstream interfaces to an uplink-state group, the downstream interfaces are not disabled.

Configuration:

1. Create an uplink-state group in CONFIGURATION mode.

   uplink-state-group group-id

2. Configure the upstream and downstream interfaces in UPLINK-STATE-GROUP mode.

   upstream {interface-type | interface-range[ track-vlt-status ] | VLTi}
   downstream {interface-type | interface-range}

3. (Optional) Disable uplink-state group tracking in UPLINK-STATE-GROUP mode.

   no enable

4. (Optional) Provide a descriptive name for the uplink-state group in UPLINK-STATE-GROUP mode.

   name string

5. Configure the number of downstream interfaces to disable, when an upstream interface goes down in UPLINK-STATE-GROUP mode.

   downstream disable links{number | all}

6. (Optional) Enable auto-recovery of downstream interfaces that are disabled in UPLINK-STATE-GROUP mode.

   downstream auto-recover

7. (Optional) Configure the timer to defer the UFD actions on downstream ports in UPLINK-STATE-GROUP mode. When you have configured to track the VLT status in a VLT network, if VLT port-channel is an upstream member of uplink-state group, then the defer timer triggers when the VLT status goes operationally down instead of the operational status of the peer port-channel.

   defer-time timer

8. (Optional) Clear the UFD error disabled state of downstream interfaces in EXEC mode.

   clear ufd-disable

OS10(config)# uplink-state-group 1
OS10(conf-uplink-state-group-1)# upstream ethernet 1/1/7:1
OS10(conf-uplink-state-group-1)# downstream ethernet 1/1/1-1/1/5
OS10(conf-uplink-state-group-1)# downstream ethernet 1/1/9:2-1/1/9:3
OS10(conf-uplink-state-group-1)# enable
OS10(conf-uplink-state-group-1)# name UFDGROUP1
OS10(conf-uplink-state-group-1)# defer-time 10
OS10(conf-uplink-state-group-1)# no downstream auto-recover
OS10(conf-uplink-state-group-1)# downstream disable links 2

OS10#show uplink-state-group 1

Uplink State Group: 1 Status: Enabled,down

OS10# show uplink-state-group 1 detail

(Up): Interface up   (Dwn): Interface down   (Dis): Interface disabled

Uplink State Group   :  1     Status   :  Enabled,up Name :  UFDGROUP1
Defer Time           :  10 second(s)
Upstream Interfaces  :  Eth 1/1/7:1(Up)
Downstream Interfaces:  Eth 1/1/1(Dwn)   Eth 1/1/2(Dwn)   Eth 1/1/3(Dwn)   Eth 1/1/4(Dwn)
                        Eth 1/1/5(Dwn)   Eth 1/1/9:2(Dwn) Eth 1/1/9:3(Dwn)

OS10#show uplink-state-group 1 detail

(Up): Interface up (Dwn): Interface down (Dis): Interface disabled (NA): Not Available

*: VLT port-channel, V: VLT status, P: Peer Operational status ^: Tracking status

Uplink State Group : 1 Name: iscsi_group, Status: Enabled, Up
Upstream Interfaces : eth1/1/35(Up) *po10(V:Up, ^P:Dwn) VLTi(NA)
Downstream Interfaces : eth1/1/2(Up) *po20(V: Up,P: Up)

OS10#show uplink-state-group 2 detail

(Up): Interface up (Dwn): Interface down (Dis): Interface disabled (NA): Not Available

*: VLT port-channel, V: VLT status, P: Peer Operational status ^: Tracking status

Uplink State Group : 1 Name: iscsi_group, Status: Enabled, Up
Upstream Interfaces : eth1/1/36(Up) *po30(^V:Up, P:Dwn) VLTi(Up)
Downstream Interfaces : eth1/1/4(Up) *po20(V: Up,P: Up)

OS10(conf-uplink-state-group-1)# show configuration
!
uplink-state-group 1
 downstream ethernet1/1/1-1/1/5
 downstream ethernet1/1/9:2-1/1/9:3
 upstream ethernet1/1/7:1