Update ip.py

Author: SRIKKANTH

lisa/tools/ip.py

@@ -220,6 +220,9 @@ def is_valid_mtu(self, value: Optional[int] = None) -> bool:
             return False
         try:
             mtu = int(value)
+            # typical MTU values are between 576 and 9000
+            # 576 is the minimum possible MTU for IPv4 and 1280 for IPv6
+            # 9000 is a common value for jumbo frames on Ethernet networks
             return 576 <= mtu <= 9000
         except ValueError:
             raise LisaException("MTU value is not an integer")