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Forum Replies

  1. Hey Rene,

    Great write up! Why does Cisco recommend using Automatic 6 to 4 tunneling over ISATAP for inter area routing? I mean, I see the name intra-site, but trying to get more clarity on why ISATAP would not/or could not be used for inter area.

    Thank you

    Roland

  2. Hello,

    I have a question regarding the 6to4 implementation:
    Should it work if i use another prefix than 2002:?

    I read couple of articles and in every place it’s written that 2002 is reserved for 6to4 implementation (like router knows how to extract 32 bit IPv4 address encoded in Hex format that goes after that prefix).

    But in my lab i just used another prefix (just for testing): 1002: and the 6to4 stuff worked properly as well.

    Can you please explain this behavior? Is it a correct and expected behavior or not?

    Thanks,
    Vladimir

  3. Hi @hussien.samer

    Remove the following two static routes:

    R1(config)#ipv6 route 2001::3/128 2002:C0A8:1703::3  
    R3(config)#ipv6 route 2001::1/128 2002:C0A8:C01::1  
    

    And then add a BGP configuration like this. R1:

    R1(config)#router bgp 13
    R1(config-router)#bgp log-neighbor-changes
    R1(config-router)#neighbor 2002:C0A8:1703::3 remote-as 13
    
    R1(config-router)#address-family ipv6
    R1(config-router-af)# neighbor 2002:C0A8:1703::3 activate
    R1(config-router-af)#exit-address-family
    

    R3:

    R3(config)#router bgp 13
    R3(config-router)#bgp log-neighbor-changes
    R3(config-router
    ... Continue reading in our forum

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