From 99809780303784dc0b9faea4f2d0f2a43c449123 Mon Sep 17 00:00:00 2001
From: suresh-rupanagudi <suresh.rupanagudi@broadcom.com>
Date: Wed, 23 Jun 2021 00:01:14 -0700
Subject: [PATCH] Added loopback interface and changed index for mgmt and
 portchannel

---
 src/swsssdk/port_util.py | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/src/swsssdk/port_util.py b/src/swsssdk/port_util.py
index a37e74ff..54737a58 100644
--- a/src/swsssdk/port_util.py
+++ b/src/swsssdk/port_util.py
@@ -15,13 +15,15 @@
 SONIC_PORTCHANNEL_RE_PATTERN = "^PortChannel(\d+)$"
 SONIC_MGMT_PORT_RE_PATTERN = "^eth(\d+)$"
 
+SONIC_LOOPBACK_RE_PATTERN = "^Loopback(\d+)$"
 
 class BaseIdx:
     ethernet_base_idx = 1
     vlan_interface_base_idx = 2000
     ethernet_bp_base_idx = 9000
-    portchannel_base_idx = 1000
-    mgmt_port_base_idx = 10000
+    portchannel_base_idx = 10000
+    mgmt_port_base_idx = 1000
+    loopback_base_idx = 20000
 
 def get_index(if_name):
     """
@@ -29,8 +31,9 @@ def get_index(if_name):
     Ethernet N = N + 1
     Vlan N = N + 2000
     Ethernet_BP N = N + 9000
-    PortChannel N = N + 1000
-    eth N = N + 10000
+    PortChannel N = N + 10000
+    eth N = N + 1000
+    loopback N = N + 20000
     """
     return get_index_from_str(if_name.decode())
 
@@ -43,13 +46,15 @@ def get_index_from_str(if_name):
     Ethernet_BP N = N + 9000
     PortChannel N = N + 1000
     eth N = N + 10000
+    loopback N = N + 20000
     """
     patterns = {
         SONIC_ETHERNET_RE_PATTERN: BaseIdx.ethernet_base_idx,
         SONIC_ETHERNET_BP_RE_PATTERN: BaseIdx.ethernet_bp_base_idx,
         SONIC_VLAN_RE_PATTERN: BaseIdx.vlan_interface_base_idx,
         SONIC_PORTCHANNEL_RE_PATTERN: BaseIdx.portchannel_base_idx,
-        SONIC_MGMT_PORT_RE_PATTERN: BaseIdx.mgmt_port_base_idx
+        SONIC_MGMT_PORT_RE_PATTERN: BaseIdx.mgmt_port_base_idx,
+        SONIC_LOOPBACK_RE_PATTERN: BaseIdx.loopback_base_idx
     }
 
     for pattern, baseidx in patterns.items():