[Webinar] Learn how to a build a cloud-first strategyRegister Now


ipv6 pings

Posted on 2014-08-11
Medium Priority
Last Modified: 2014-08-12
just wondering if someone can clarify this to me? these are pings examples between 2 routers in the same network segment . why are pings successful in the first and not in the 2nd?

2001:aaaa:bbbb::1/48 pings 2001:aaaa:bbbb::2/54      = good >> why? because it shares major prefix length? arent these 2 different networks indicated by the / ?  
2001:aaaa:bbbb::1/48 pings 2001:aaaa:bbbb:400::3/54 = bad >> why? these are 2 different networks but why did the pings go through on the first?
Question by:lurezero
1 Comment
LVL 30

Accepted Solution

Rich Weissler earned 2000 total points
ID: 40255969
the /48 and /54 denote how much of the address is the link/subnet portion.  In the first case, they are on the same network because:
2001:aaaa:bbbb (which is the first 48 bits) = 2001:aaaa:bbbb:00 (which would be the first 56 bits)  (The second host would assume the first is on it's same link, so would send the response back to it directly.)

In the second case:
2001:aaaa:bbbb != 2001:aaaa:bbbb:40  
So, in the second case, I believe the hose with the /54 would send the response to it's default gateway rather than back to the first host.

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A common practice in small networks is making file sharing easy which works extremely well when intra-network security is not an issue. In essence, everyone, that is "Everyone", is given access to all of the shared files - often the entire C: drive …
Creating an OSPF network that automatically (dynamically) reroutes network traffic over other connections to prevent network downtime.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor (https://www.adremsoft.com/). Top Charts is a view in which you can set seve…
Suggested Courses
Course of the Month20 days, 12 hours left to enroll

864 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question