Validating Connections between device port and Onpath port

[Quali-Community]

Onpath connection validation

 

How to determine if a device port is connected to the correct Onpath switch port?

In a lab, equipment often gets moved or connections changes, it is hard to keep up with the connections between device port and Onpath switch port.

Validation of connections between device port and Onpath switch are needed to maintain the validity of tests connections.

 

Solution:

The Cisco and Juniper devices have the capability to “no shutdown” or “shutdown” port whereas the Juniper “enable” or “disable” port; in effect turn-up the administrative status of the device.

There are two statuses in the port that can be used to determine the state of the port.

 For Cisco device the Administrative and Protocol statuses and Juniper is the Administrative and Link statuses.

 

To confirm if the port is connected to the correct Onpath port:

1. Bring the administrative status up with loopback on the Onpath port then check the device port status. The commands to check are: Cisco “show interface <interface name>”, Juniper “show interfaces terse <interface name>”

	Administrative	Protocol/Link
Cisco CE	up	up
Cisco XR	up	up
Juniper	up	up

 

 

1. Disconnect/unloop the Onpath port

	Administrative	Protocol/Link
Cisco CE	up	down
Cisco XR	down	down
Juniper	up	down

 

1. Connect/Looped the Onpath port

	Administrative	Protocol/Link
Cisco CE	up	up
Cisco XR	up	up
Juniper	up	up

 

The change in the Protocol/Link state will shows the port act accordingly to the change in the loop mode of the Onpath. Hence, the port is connected correctly.

 

Find the port connection to the Onpath port requires the “Acknowledge of the alarms” on the Onpath switch.  Current issue, through the CLI the Onpath takes a long time to ACK high number of alarms.

Process to locate the Onpath port connection:

Bring up the administrative status on the device port and looped all the Onpath ports on the switch

1. “ACK” the alarms on the Onpath: Command “ack prtn alarm all”
2. Bring down the administrative status on the device port. This step will trigger an LOS alarm on the Onpath port that it is connected to.
3. Get the port alarm: “display port alarms current”, returns the latest alarm on the port that connected to the device port. From this command the user can determine which Onpath port the device port is connected to.

This steps need to be repeated a few times to make sure the information is correct.

 

 

 

 

Commands needed

Bringing administrative up/down:

Cisco device:

1. Config term
2. Enable
3. Interface <interface name>
4. [no shutdown|shutdown]
5. for XR device: "commit"
6. End

 

Juniper device:

1. Edit
2. Set interface <interface name> [enable|disable]
3. Commit
4. Exit

 

Onpath port Loop command: “conn prtn <x.y.z> to <x.y.z> force

Onpath port unloop command: “conn prtn <x.y.z> to null force

Show if the port is loop command: “display connected ports sea <x.y.z>”

 

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 Son Nguyen (son.n) - 02/12/2014 05:32 PM

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