How to get EPG's, VRF's, L3Out uplinks, and Leafs

[petersmiddy]

We use a network-centric design. My end goal is to get an idea of how many VLANs (EPG's) & VRF's, as well as how many L3Out uplinks (routed interfaces and SVI's) there are in an existing Tenant. 

For the L3Out uplinks I think I just need the tDN under the l3extRsPathL3OutAtt objects, which will give me the leaf number. 

Any help is greatly appreciated. Thanks!

[RedNectar · Accepted solution]

Hi @petersmiddy ,

I'm not sure if you want to count VLANs or EPGs or VRFs.  However, the following set of commands (shamelessly stolen from this blog) might give you some direction. [Disclosure: The aforementioned blog is my blog]

apic1# bash
admin@apic1:-> for VRF in $(icurl -s "http://localhost/api/node/class/fvCtx.json"|
jq -r .imdata[].fvCtx.attributes.dn) 
do 
  echo EPGs for Tenant $(echo ${VRF}|cut -d'/' -f2 | 
  cut -b 4-) VRF $(echo ${VRF}|cut -d'/' -f3|cut -b 5-)
  for BD in $(icurl -s "http://localhost/api/node/mo/${VRF}.json?query-target=children&target-subtree-class=fvRtCtx"|
  jq -r '.imdata[].fvRtCtx.attributes |
  (.dn|capture("rtctx-\\[(?<B>.*)]").B)')
  do 
    icurl -s "http://localhost/api/node/mo/${BD}.json?query-target=children&target-subtree-class=fvRtBd"|
    jq '.imdata[].fvRtBd.attributes|
    ("AP/EPG: \(.tDn|
    capture("'"/ap-(?<A>.*)/epg-"'").A)\/\(.tDn|
    capture("'"/epg-(?<E>.*)"'").E)")'
  done
done

Click to expand to see my sample output

EPGs for Tenant common VRF copy
EPGs for Tenant infra VRF overlay-1
"AP/EPG: access/default"
EPGs for Tenant infra VRF ave-ctrl
"AP/EPG: ave-ctrl/ave-ctrl"
EPGs for Tenant common VRF default
EPGs for Tenant mgmt VRF oob
EPGs for Tenant mgmt VRF inb
EPGs for Tenant common VRF SharedServices_VRF
"AP/EPG: SharedServices_AP/SharedServices_EPG"
EPGs for Tenant T09 VRF Production_VRF
"AP/EPG: 2Tier_AP/AppServers_EPG"
"AP/EPG: 2Tier_AP/WebServers_EPG"
EPGs for Tenant T10 VRF Production_VRF
"AP/EPG: 2Tier_AP/AppServers_EPG"
"AP/EPG: 2Tier_AP/WebServers_EPG"
EPGs for Tenant Tenant04 VRF Production_VRF
"AP/EPG: 2Tier_AP/AppServers_EPG"
"AP/EPG: 2Tier_AP/WebServers_EPG"
EPGs for Tenant Tenant02 VRF Production_VRF
"AP/EPG: 2Tier_AP/AppServers_EPG"
"AP/EPG: 2Tier_AP/WebServers_EPG"
EPGs for Tenant Tenant03 VRF Production_VRF
"AP/EPG: 2Tier_AP/AppServers_EPG"
"AP/EPG: 2Tier_AP/WebServers_EPG"
EPGs for Tenant Tenant07 VRF Production_VRF
"AP/EPG: 2Tier_AP/AppSERVER_EPG"
"AP/EPG: 2Tier_AP/WebSERVER_EPG"
EPGs for Tenant Tenant08 VRF Production_VRF
"AP/EPG: 2Tier_AP/AppServers_EPG"
"AP/EPG: 2Tier_AP/WebServers_EPG"
EPGs for Tenant Tenant06 VRF Production_VRF

Pretty boring output on my system which is the remnant of a class that ran last week, hence so much repetition.

Anyway - if this is NOT what you are looking for, you may find your answer in the link I surreptitiously snuck in earlier. Or come back with more detail.

And as you said, the l3extRsPathL3OutAtt should give you all the info you need for L3Outs.

[petersmiddy]

@RedNectar - Thank you so much for the prompt response!  I was getting no output at first, but then read more of your blog, and figured out I need to do an icurl -ks , I am getting exactly what I was after.  I'm going to compile this information, and then work on the L3Out stuff.  Again, thank you for the quick and accurate assistance with this.