Fix an issue of all lldp entries take some time to be in DB after reb…

…oot in scaling setup. (sonic-net#15731)

Fix an issue of all lldp entries take some time to be in DB after reboot in scaling setup

tests/lldp/test_lldp_syncd.py

@@ -356,11 +356,6 @@ def test_lldp_entry_table_after_reboot(
 ):
     duthost = duthosts[enum_rand_one_per_hwsku_frontend_hostname]
 
-    # Verify LLDP_ENTRY_TABLE keys match show lldp table output at the start of test
-    keys_match = wait_until(30, 5, 0, check_lldp_table_keys, duthost, db_instance)
-    if not keys_match:
-        assert keys_match, "LLDP_ENTRY_TABLE keys do not match 'show lldp table' output"
-
     # reboot
     logging.info("Run cold reboot on DUT")
     reboot(
@@ -372,6 +367,12 @@ def test_lldp_entry_table_after_reboot(
         safe_reboot=True,
         check_intf_up_ports=True
     )
+
+    # Wait till we have all lldp entries in the DB after reboot. It's found in scaling
+    # setup this may take some time to happen.
+    keys_match = wait_until(90, 5, 30, check_lldp_table_keys, duthost, db_instance)
+    if not keys_match:
+        assert keys_match, "LLDP_ENTRY_TABLE keys do not match 'show lldp table' output"
     lldp_entry_keys = get_lldp_entry_keys(db_instance)
     lldpctl_output = get_lldpctl_output(duthost)
     show_lldp_table_int_list = get_show_lldp_table_output(duthost)