Unable to resolve ACI faullt Code: F0849

[Arjun_bhosale]

Hi,

I am trying to connect a Leaf switch (N9K-C93180YC-EX) to FI-A (UCS-FI-6332-16UP) on QSFP[40G] interface.

I have created vPC domain, vPC interface policy with Port channel a LACP active, leaf interface profile with port selector as 1/54.

But I am geting this fault F0849.

I found this doucment:

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/2-x/syslog/guide/b_ACI_System_Messages_Guide/b_ACI_System_Messages_Guide_chapter_011.html

which states: "Fabric ports are not allowed to be configured using infra port selector."

Is the QSFP interface known as Fabric port and not the host port ?

Thanks,

Arjun B.

[Jayesh Singh · Accepted solution]

Hi Arjun,

There is a port conversion feature (uplink to downlink or vice-versa) available in ACI which is needed here.

But this feature is introduced from ACI version 3.1(1) only. So if you are running 3.1(1) or higher, then you can use 4 ports out of 6 uplink ports as downlink. Please note that port no. 53 and 54 cant be converted, so they will always we uplink ports.

Configuration steps would be like:

Fabric -> Inventory -> Expand Pod<#> -> Select Leaf-# -> Interface Tab (on right) -> Change Mode to Configuration(drop down on right side) -> Select Interface -> Click on  Downlink option above -> Submit(on pop up window)

Note: For this change to take effect, switch will require a reload. Be careful while making this change in production setup. You will also get the option of "Submit and Reload Switch" on the pop up window at the end.

Additional Docs:

snip from ACI Fundamentals doc,

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/1-x/aci-fundamentals/b_ACI-Fundamentals/b_ACI-Fundamentals_chapter_010011.html

ACI 3.1(1) release notes for your reference:

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/3-x/release_notes/apic_rn_311.html#NewSoftwareFeatures

Regards,

Jayesh

Rate all post that are helpful. Mark it as a solution if it solves your problem, it might help other users who have the same query.

[Arjun_bhosale]

---

@Jayesh Singh  wrote:

Hi Arjun,

There is a port conversion feature (uplink to downlink or vice-versa) available in ACI which is needed here.

But this feature is introduced from ACI version 3.1(1) only. So if you are running 3.1(1) or higher, then you can use 4 ports out of 6 uplink ports as downlink. Please note that port no. 53 and 54 cant be converted, so they will always we uplink ports.

Configuration steps would be like:

Fabric -> Inventory -> Expand Pod<#> -> Select Leaf-# -> Interface Tab (on right) -> Change Mode to Configuration(drop down on right side) -> Select Interface -> Click on  Downlink option above -> Submit(on pop up window)

Note: For this change to take effect, switch will require a reload. Be careful while making this change in production setup. You will also get the option of "Submit and Reload Switch" on the pop up window at the end.

Additional Docs:

snip from ACI Fundamentals doc,

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/1-x/aci-fundamentals/b_ACI-Fundamentals/b_ACI-Fundamentals_chapter_010011.html

ACI 3.1(1) release notes for your reference:

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/3-x/release_notes/apic_rn_311.html#NewSoftwareFeatures

Regards,

Jayesh

---

 It has resolved the issue, Thanks a lot Jayesh for the suggestion.

Regards,

Arjun Bhosale

[Jayesh Singh]

Thanks for the update! Good to know that the issue has been resolved...

[izzy_m]

I am having the same problem - getting the same faults F0849, ACI 4.1(1j).

I have connected two FI-6332-16UP to ports 1&2 on 2x93180LC-EX (Leaf 1 and Leaf 2) via two separate LACP VPCs. The VPCs are formed and everything seems to be functioning. What is the downside of this?

Also, if I try to follow your directions, the Downlink button is grayed out. Should I be worried about it or just ignore it and continue with my life?: