Dear NSO community,
I have 2 questions related to following model, any help is appreciated ..
Ultimately I want to achieve this : When operator selects core-device and core-device-interface ( NSO fetches interfaces which has /30 mask in the example below ), NSO would fetch next-hop-device as the router connected to other end of the selected core-device-interface.
Question 1/ As an interim step, I want to fetch next-hop-device as “router which has 1.1.2.3 ip address configured to one of its ports”. Following xpath expression finds the correct device successfully only when 1.1.2.3 ip configured to the first Gi interface on that device, typically 0/1. But, if i configure 1.1.2.3 ip to , lets say Gi 0/2 interface and Gi 0/1 is configured with any other ip address, then cli hangs while trying to fetch next-hop-device object. I tried couple of things, but couldn't succeed.
Question 2/ Instead of fetching router which has 1.1.2.3 ip address configured to one of its ports, I want to fetch router which has ( core-device-interface-ip + 1 ) ip address configured to one of its ports. Question is how can i do this ?
module aaa {
namespace "http://com/poc/aaa";
prefix aaa;
import ietf-inet-types {
prefix inet;
}
import tailf-common {
prefix tailf;
}
import tailf-ncs {
prefix ncs;
}
import tailf-ned-cisco-ios {
prefix ios;
}
container topology {
list branch {
key branch-name;
leaf branch-name {type string;}
leaf branch-core-device {
type leafref {
path "/ncs:devices/ncs:device/ncs:name";
}
}
list branch-devices {
key branch-device;
leaf branch-device {
type leafref {
path "/ncs:devices/ncs:device/ncs:name";
}
}
}
}
}
list aaa-service {
key name;
leaf name {
type string;
}
uses ncs:service-data;
ncs:servicepoint aaa-servicepoint;
container bbb {
leaf core-device {
type leafref {
path "/topology/branch/branch-core-device";
}
}
leaf core-device-interface { // fetch interfaces with /30 mask
type leafref {
path "/ncs:devices/ncs:device[ncs:name=current()/../core-device]/ncs:config/ios:interface/ios:GigabitEthernet/ios:name";
}
must "starts-with(deref(current())/../ios:ip/ios:address/ios:primary/ios:mask, '255.255.255.252')";
}
leaf core-device-interface-ip { // retrieve IP address of the core-device-interface selected
type leafref {
//path "deref(current()/../core-device-interface)/../ios:ip/ios:address/ios:primary/ios:address";
path "/ncs:devices/ncs:device[ncs:name=current()/../core-device]/ncs:config/ios:interface/ios:GigabitEthernet[ios:name=current()/../core-device-interface]/ios:ip/ios:address/ios:primary/ios:address";
}
}
leaf next-hop-device { // select branch device which has ( core-device-interface-ip + 1 ) ip address on one of its interfaces.. in the interim: fetch router with 1.1.2.3 on one of its intf
type leafref {
path "/topology/branch/branch-devices/branch-device";
}
must "starts-with(/ncs:devices/ncs:device[ncs:name=current()]/ncs:config/ios:interface/ios:GigabitEthernet/ios:ip/ios:address/ios:primary/ios:address, '1.1.2.3')";
}
}
}
}
Many thanks in advance.
