COMPARISON OF CISCO AND JUNIPER ADMINISTRATIVE DISTANCE

Administrative Distance (AD) is the value of reliability or trustworthiness of a protocol, for selecting routes to be placed in routing table.
If a layer 3 device (like Router) has routes to same destination from two different routing protocols, the route with lowest AD will be preferred and henceforth its routes will be installed in the Routing / Forwarding table.
Below comparison chart shares AD value of protocols in Cisco and Juniper platform –

PROTOCOL

CISCO

JUNIPER

 Connected / Direct  0 0
 Static  1  5
 EIGRP Summary  5  –
 OSPF Internal  –  10
 IS-IS Level 1 Internal  –  15
 IS-IS Level 2 Internal  –  18
 BGP External  20  –
 EIGRP Internal  90  –
 OSPF All  110  –
 IS-IS All  115  –
 RIP  120  100
 OSPF External  –  150
 IS-IS Level 1 External  –  160
 IS-IS Level 2 External  –  165
 EIGRP External  170  –
 BGP All  –  170
 BGP Internal  200  –
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