the relationship between "sdwan config" and "running config"

[yutashimamura2920]

I am currently woriking on sd-wan project, and come up with a few questions.

Am I correct in understanding that ”running-config” is created based on ”sdwan running-config”?

Is the router running with reference to "show sdwan running-configuration" or "show running-configuration"?

Thanks,
Yuuta

[svemulap@cisco.com]

hi Yuuta -

No. 'running-config' is not created based on 'sdwan running-config'
When the node is in SDWAN mode, (aka controller-mode) - edge device uses 'sdwan running-config'
SDWAN is supported ONLY in this mode. (controller-mode)
Non-SDWAN mode - is called 'autonomous mode (show running-config)
... and is the default-mode that the device boots up with.

HTH

[yutashimamura2920]

Thank you for your useful comment.
>'running-config' is not created based on 'sdwan running-config'
So, how "running-config" made from?
I push sdwan configuration from vManage, then configuration change was reflected both of "show sdwan running-config" and "show running-config" so that I have thought "running-config" is made from "sdwan running-config"..
cEdge is Controller -mode now.

[svemulap@cisco.com · Accepted solution]

hi yutashimamura2920 -

>> So, how "running-config" made from?
The running-config is the one - which is default from IOS-XE Polaris
There could be some default configs. that could overlap.
BUT from SDWAN side - (w/ controller-mode ON) - it is always 'sdwan running-config'

The Conf-D (configuration daemon) of SDWAN only absorbs 'sdwan running-config'

HTH

[yutashimamura2920]

Thank you for your detail explanation!


I recently had a problem with cEdge's BGP neighbor not going up.
The cause was that there was " no neighbor XX.XX.XX.XX active" command was configured.
I could see " no neighbor XX.XX.XX.XX active" on " show run " command, but cound not see it on " show sdwan run" command.

Am I correct in understanding that some configurations such as " no neighbor XX.XX.XX.XX activate" are not shown by "show sdwan run"?

Router#show sdwan run | sec bgp                                                                                                                                                                            router bgp 64565                                                                                                                                                                                                                     bgp router-id        3.3.21.1                                                                                                                                                                                                       bgp log-neighbor-changes                                                                                                                                                                                                            distance bgp 20 200 20                                                                                                                                                                                                              neighbor 206.115.36.53 remote-as 1684                                                                                                                                                                                               neighbor 206.115.36.53 ebgp-multihop 1                                                                                                                                                                                              timers bgp 30 90                                                                                                                                                                                                                      allow-service bgp                                                                                                                                                                                                                   no allow-service bgp                                                                                                                                                                                                             Router#                                                                                                                                                                                                    Router#  

It seems "no neighbor 206.115.36.53 activate" is not configured on show sdwan run.

                                                                                                                                                                                                  Router#show run | sec bgp                                                                                                                                                                                  router bgp 64565                                                                                                                                                                                                                     bgp router-id 3.3.21.1                                                                                                                                                                                                              bgp log-neighbor-changes                                                                                                                                                                                                            timers bgp 30 90                                                                                                                                                                                                                    neighbor 206.115.36.53 remote-as 1684                                                                                                                                                                                               !                                                                                                                                                                                                                                   address-family ipv4                                                                                                                                                                                                                  no neighbor 206.115.36.53 activate                             <<<<<<<<<<<<                                                                                                                                                                    exit-address-family                                                                                                                                                                                                                snmp-server enable traps bgp                                                                                                                                                                                                        snmp-server enable traps bgp cbgp2                                                                                                                                                                                                  Router#

"no neighbor 206.115.36.53 activate" is configured on show run.

[Kanan Huseynli]

Could you share you entire BGP template?

[yutashimamura2920]

I will share BGP template after i get it.
but,no neighbor XX.XX.XX.XX activate configuration was not visible on "show sdwan run"..

[Kanan Huseynli]

Hi,

output of "running-config" from vManage GUI is the same with "show sdwan running-config".

Router uses both show run and show sdwan run (mostly the overlap) configuration. There are some default configuration which is not reflected to show sdwan run like VRF 65528/65529 or service alg for nat.

Site1-RTR1#show running-config | inc vrf definition
vrf definition 1
vrf definition 65528
vrf definition 65529
vrf definition Mgmt-intf
Site1-RTR1#show sdwan running-config | inc vrf definition
vrf definition 1
vrf definition Mgmt-intf

Site1-RTR1#show sdwan running-config | inc alg
Site1-RTR1#show running-config | inc alg
no ip nat service all-algs