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Beginner

Ipv6 addressing

Hi guys, Need your expert advise. ISP has given me a /64 block and an ethernet link to their PE router. I have an isr router with 2 fa. I want to give each fa an ip address from the block above. I tried using subnet calculator and applied /120 on each fa. I can ping sourcing from the fa (connected to the isp cable) successfully. However sourcing from the other fa, i cant. Is there anything missing? Thanks.
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1 ACCEPTED SOLUTION

Accepted Solutions
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Cisco Employee

Hi,How is your ISP side

Hi,

How is your ISP side interface configured?. Is it with /120 mask or /64?. If it is /120, you should make sure the ISP have a return path pointing towards you.

 

if it is /64, you need to enable proxy arp in your interface towards ISP cable.

 

-Nagendra

View solution in original post

4 REPLIES 4
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Beginner

No acls. Just plain config.

No acls. Just plain config. Im trying to ping the PE interface.
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Beginner

What is the output of "show

What is the output of "show ipv6 route" ?

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Enthusiast

Can you share the config?

Can you share the config?

Highlighted
Cisco Employee

Hi,How is your ISP side

Hi,

How is your ISP side interface configured?. Is it with /120 mask or /64?. If it is /120, you should make sure the ISP have a return path pointing towards you.

 

if it is /64, you need to enable proxy arp in your interface towards ISP cable.

 

-Nagendra

View solution in original post