BGP MD5 Configuration on Cisco - Juniper - Nokia Interop

 In this blog, I will explain the benefits of the MD5 concept and how to configure it on Cisco, Juniper, and Nokia Router

TCP-MD5

MD5 is used to protect the BGP session between the peers to form the secured session over the public Network. 

TCP MD5 option supports only one key for a connection. Further, it only supports the MD5 algorithm. The MD5 algorithm takes the “secret” from the key and the TCP segment for encryption and generates a message digest. This message digest is then copied to the MD5 digest field in the TCP segment and is sent to the receiving device.





Cisco XR

router bgp 300
 neighbor 192.168.1.1
  password encrypted 011D03104C0414042D4D4C


Juniper

edit protocols {                             
    bgp {
        group nokia {
            neighbor 192.168.0.1 {
                authentication-key "key"; ## SECRET-DATA
                }
      
Nokia

/configure router 
protocols {                             
    bgp {
     group "juniper"
                type external
                local-as 100
                neighbor 192.168.0.2
                    authentication-key "D8XsPtn4bCNLm" hash2
                    peer-as 200
                exit


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