<p>Most servers aren't validators and so cannot appear on anyone else's UNL.</p>

CC BY-SA 3.0
2015-10-27T00:23:11.950Z
What if both nodes T, S are validators? If T adds S to its UNL, does S add T to its own UNL?
Albert S
CC BY-SA 3.0
2015-10-27T00:24:12.570Z
That's up to S.
David Schwartz
CC BY-SA 3.0
2015-10-26T23:09:55.897Z
2015-10-26T23:09:55.897Z
David Schwartz
<p>I am interested in UNL construction.
If some server S is on the UNL of server T, does this imply that server T is on the UNL of server S?
Or in other words if I constructed an UNL graph would it be a directed graph?</p>

CC BY-SA 3.0
2015-10-26T20:24:38.830Z
If you haven't looked at https://wiki.ripple.com/Unique_Node_List it might be able to help explain some.
Charles S
CC BY-SA 3.0
2015-10-26T21:48:44.520Z
@CharlesS It's worth noting that the wiki page is more than a year old, and might be substantially out of date.
Nick ODell
CC BY-SA 3.0
2015-10-26T22:07:49.683Z
No doubt. That's why I posted as a comment. Just giving a resource.
Charles S
<ripple>
Ripple: How is an UNL (unique node list) constructed?
Albert S
# Ripple: How is an UNL (unique node list) constructed?

(Asked by: username_0 on 2015-10-26)

I am interested in UNL construction.
If some server S is on the UNL of server T, does this imply that server T is on the UNL of server S?
Or in other words if I constructed an UNL graph would it be a directed graph?

**Tags:** ripple

> **Comments:**
> **username_1**: If you haven't looked at https://wiki.ripple.com/Unique_Node_List it might be able to help explain some.  
> **username_2**: @username_1 It's worth noting that the wiki page is more than a year old, and might be substantially out of date.  
> **username_1**: No doubt. That's why I posted as a comment. Just giving a resource.  

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## 1 answers

### Answer by username_3 on 2015-10-26. Score: 2

Most servers aren't validators and so cannot appear on anyone else's UNL.

> **Comments:**
> **username_0**: What if both nodes T, S are validators? If T adds S to its UNL, does S add T to its own UNL?  
> **username_3**: That's up to S.  

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