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Update faq.md

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@ -32,6 +32,14 @@ Yggdrasil uses the `0200::/7` range, which is a range deprecated by the IETF. It
As long as you are not using this deprecated address range on your network, you will not experience any routing conflicts. As long as you are not using this deprecated address range on your network, you will not experience any routing conflicts.
### Can the network be crawled?
Currently it is possible to crawl the network to reveal the spanning tree relationships. This is how the [network map](http://51.15.204.214) and popularity contest are generated. However, it is considered a design weakness that this is even possible currently and will hopefully be fixed in the future.
### Can I run a crawler?
Please don't run your own network crawler. Crawlers generate a lot of network-wide protocol traffic and effect is amplified by each additional crawler. If you really really *really* want information about the network today, use an [existing data source within the network](http://[301:4541:2f84:1188:216:3eff:feb6:65a3]:3001/nodeinfo.json) instead of crawling yourself.
### I've just installed Yggdrasil and I can't ping anyone. What have I missed? ### I've just installed Yggdrasil and I can't ping anyone. What have I missed?
Yggdrasil requires that you configure either a static peer to another Yggdrasil node, or that you discover another Yggdrasil node *on the same subnet* using multicast discovery (which is enabled by default). If you have not added or discovered any peers, you will not be able to reach beyond your own node. Yggdrasil requires that you configure either a static peer to another Yggdrasil node, or that you discover another Yggdrasil node *on the same subnet* using multicast discovery (which is enabled by default). If you have not added or discovered any peers, you will not be able to reach beyond your own node.