docs: add a documentation on how to operate Akvorado

Currently, how to configure routers.

console/data/docs/04-operations.md

@@ -0,0 +1,80 @@
+# Operations
+
+## Router configuration
+
+Each router should be configured to send flows to Akvorado inlet
+service and accepts SNMP requests.
+
+### NCS 5500 and ASR 9000
+
+On each router, Netflow can be enabled with the following configuration:
+
+```cisco
+sampler-map sampler1
+ random 1 out-of 30000
+!
+flow exporter-map akvorado
+ version v9
+  options interface-table timeout 10
+  options vrf-table timeout 10
+  options sampler-table timeout 10
+  template options timeout 10
+ !
+ transport udp 2055
+ source Loopback20
+ destination <akvorado-ip> vrf private
+!
+flow monitor-map monitor1
+ record ipv4
+ exporter akvorado
+ cache entries 100000
+ cache timeout active 15
+ cache timeout inactive 2
+ cache timeout rate-limit 2000
+!
+flow monitor-map monitor2
+ record ipv6
+ exporter akvorado
+ cache entries 100000
+ cache timeout active 15
+ cache timeout inactive 2
+ cache timeout rate-limit 2000
+!
+```
+
+Optionally, AS path can be pushed to the forwarding database and the
+source and destination AS will be present in Netflow packets:
+
+```
+router bgp <asn>
+ address-family ipv4 unicast
+  bgp attribute-download
+!
+ address-family ipv6 unicast
+  bgp attribute-download
+```
+
+To enable Netflow on an interface, use the following snippet:
+
+```cisco
+interface Bundle-Ether4000
+ flow ipv4 monitor monitor1 sampler sampler1 ingress
+ flow ipv6 monitor monitor2 sampler sampler1 ingress
+!
+```
+
+Also check the [troubleshooting section](05-troubleshooting.md) on how
+to scale Netflow on the NCS 5500.
+
+Also, SNMP needs to be enabled:
+
+```cisco
+snmp-server community <community> RO IPv4
+snmp-server ifindex persist
+control-plane
+ management-plane
+  inband
+   interface all
+    allow SNMP peer
+     address ipv4 <akvorado-ip>
+```