topotests : Topotest for different VRF in isisd

1. Topotest for isis-vrf is added for ipv4 and ipv6.
2. Test case for checking isis topology.
3. Test case for checking zebra isis routes.
4. Test case for checking linux vrf routes.
5. 2 new API's written in topotest/lib for checking vrf routes.

Co-authored-by: Kaushik <kaushik@niralnetworks.com>"
Signed-off-by: harios_niral <hari@niralnetworks.com>

1 files changed, 84 insertions, 0 deletions

diff --git a/tests/topotests/lib/topotest.py b/tests/topotests/lib/topotest.py
index 766ab71ed1..5acec83b6e 100644
--- a/tests/topotests/lib/topotest.py
+++ b/tests/topotests/lib/topotest.py
@@ -721,6 +721,49 @@ def ip4_route(node):
     return result
 
 
+def ip4_vrf_route(node):
+    """
+    Gets a structured return of the command 'ip route show vrf {0}-cust1'.
+    It can be used in conjuction with json_cmp() to provide accurate assert explanations.
+
+    Return example:
+    {
+        '10.0.1.0/24': {
+            'dev': 'eth0',
+            'via': '172.16.0.1',
+            'proto': '188',
+        },
+        '10.0.2.0/24': {
+            'dev': 'eth1',
+            'proto': 'kernel',
+        }
+    }
+    """
+    output = normalize_text(
+            node.run("ip route show vrf {0}-cust1".format(node.name))).splitlines()
+
+    result = {}
+    for line in output:
+        columns = line.split(" ")
+        route = result[columns[0]] = {}
+        prev = None
+        for column in columns:
+            if prev == "dev":
+                route["dev"] = column
+            if prev == "via":
+                route["via"] = column
+            if prev == "proto":
+                # translate protocol names back to numbers
+                route["proto"] = proto_name_to_number(column)
+            if prev == "metric":
+                route["metric"] = column
+            if prev == "scope":
+                route["scope"] = column
+            prev = column
+
+    return result
+
+
 def ip6_route(node):
     """
     Gets a structured return of the command 'ip -6 route'. It can be used in
@@ -761,6 +804,47 @@ def ip6_route(node):
     return result
 
 
+def ip6_vrf_route(node):
+    """
+    Gets a structured return of the command 'ip -6 route show vrf {0}-cust1'.
+    It can be used in conjuction with json_cmp() to provide accurate assert explanations.
+
+    Return example:
+    {
+        '2001:db8:1::/64': {
+            'dev': 'eth0',
+            'proto': '188',
+        },
+        '2001:db8:2::/64': {
+            'dev': 'eth1',
+            'proto': 'kernel',
+        }
+    }
+    """
+    output = normalize_text(
+            node.run("ip -6 route show vrf {0}-cust1".format(node.name))).splitlines()
+    result = {}
+    for line in output:
+        columns = line.split(" ")
+        route = result[columns[0]] = {}
+        prev = None
+        for column in columns:
+            if prev == "dev":
+                route["dev"] = column
+            if prev == "via":
+                route["via"] = column
+            if prev == "proto":
+                # translate protocol names back to numbers
+                route["proto"] = proto_name_to_number(column)
+            if prev == "metric":
+                route["metric"] = column
+            if prev == "pref":
+                route["pref"] = column
+            prev = column
+
+    return result
+
+
 def ip_rules(node):
     """
     Gets a structured return of the command 'ip rule'. It can be used in