vEdge 20.15.1 - Error: application communication failure

[A900]

Hi,

I’m using CML 2.8.1 Personal and have deployed SD-WAN version 20.15.1. However, I’m encountering an issue where I can’t execute a specific command on vEdge 20.15.1. Despite successfully installing the root certificate, the error persists. I’ve also tried restarting the router, but it hasn’t resolved the problem. Does anyone know the root cause of this issue?

vEdge01# show control loc
Error: application communication failure

vEdge01# show control connections
Error: application communication failure

vEdge01# show control connections-history
Error: application communication failure

vEdge01# show system process all

Legends
A -> Active D -> Down/Disabled
C -> Critical R -> Restartable
V -> Valgrind

SERVICE STATUS VPN PID UPTIME WATCHDOG
----------------------------------------------------------------------
512-ntpd A 512 2041 43m:23s -
aaamgr A,R 0 1898 43m:26s -
acpid A 0 634 44m:5s -
cfgmgr A,C 0 931 43m:53s 3s ago
confd A,C 0 929 43m:53s -
crond A 0 645 44m:5s -
dbgd A,C 0 1900 43m:27s 5s ago
ephemeral A 0 652 44m:5s -
getty-tty0 A 0 658 44m:5s -
getty-ttyS0 A 0 661 44m:5s -
idmgr A,R 0 1903 43m:27s 7s ago
monit A 0 11413 22m:45s -
ompd A,C 0 1910 43m:28s 7s ago
resolvd A,C 0 1914 43m:28s 7s ago
sshd A,R 0 1922 43m:28s -
sshd-512 A,R 512 1331 43m:40s -
sysmgrd A,C 0 686 44m:5s 3s ago
ttmd A,C 0 1930 43m:28s 6s ago
vdhcpcd A,C 0 1933 43m:28s 7s ago
vsnmpd A,R 0 1945 43m:28s 7s ago
vtracker A,C 0 1952 43m:28s 8s ago
zebra A,C 0 1089 43m:48s 1s ago
zebra-512 A,C 512 1332 43m:41s 0s ago

[balaji.bandi]

SD-WAN required good compute requirement, what kind of resource you have for CML 2.8

check resournce minimum and also other node resource requirement.

https://developer.cisco.com/docs/modeling-labs/system-requirements/

[A900]

I don't think it's a resource issue. CML2.8.1 is running with 80 GB of RAM and 16 CPUs. I also checked the resource utilization of each component, and it's under 30%. Also, I was able to configure the vEdge and install the root certificate.

[balaji.bandi]

your orginal port does not cover what resource you have, hence that question of recouce we see normally.

how many vedge device you have ? is this only having issue ? can you try different Image version ?

when i tried 20.7.X works as expected part of CCIE IE preparation labs

check some command level CPU utilisation or resources:

show alarms { cpu-usage | history | memory-usage | disk-usage | disk-speed }

[A900]

Thank you for looking into this.
I have 3 vEdges and 1 cEdge. There are no issues with the cEdge when running the "show sdwan control" commands. I also powered off all components to rule out any resource issues. CML 2.8.1 comes with version 20.15.1, and I spent time setting it up.

I’ve worked on previous labs using version 20.7.x on EVE-Eng without any issues.

[balaji.bandi]

so you confirmed cedge working as expected, then vedge issue, so we need to look what is the issue, if you are not looking that version, if i were you i will try later version or one version and see if that works.

[A900]

The primary purpose of this post is to investigate and identify the underlying cause of the error I'm encountering. I have eliminated CPU\RAM resource issues as potential causes. Therefore, I’m hoping that someone from Cisco can provide insight into the root cause of this issue, along with a possible solution, particularly for those looking to use vEdge v20.15.1.

As a reference, I have successfully uploaded vEdge versions 20.7.1 and 20.10.1 to CML 2.8.1, and both versions have been functioning without any issues. Also, I was able to onboard these versions to Manager v20.15.1 without facing any problems.

[balaji.bandi]

Then Raise TAC case or contact CML support.,

[A900]

l”d if I could.

CML PERSONAL

* Community support only

CML ENTERPRISE

* Community and TAC support

[balaji.bandi]

In that case, I ignored it and moved on to the labs. What image is working? Most of the images and concepts are the same, until the latest one has a unique feature you're looking to test. If not, the old image is still suitable for testing features.

In the Live environment, we use the same code as you mentioned, but I am unable to replicate the issue.

[Brandon Goree]

Hello, did you ever find a resolution to this issue?

[A900]

Thanks for following up. Unfortunately, I haven’t found a resolution for the vEdge image 20.15.1 issue yet. Also, I discovered that the cEdge image for 2.8.1 requires significantly more resources, both RAM and CPU, which seems to be related to a potential bug.

To continue with my lab work, I had to revert to using previous edge releases. I’m leaving my post to see if other members are experiencing similar issues.

[ahmadg3387]

I am also facing this same error, on cedge everything working fine however with vedge application communication failure.

[A900]

Thank you for your pst. It is most likely a bug and hopefully Cisco fix it in the new 2.8.x release.