I would check to make sure that your VPN is permitting fragmented udp packets to be sent and verify that traffic is actually being received on both ends with wireshark or tcpdump.
Jeffrey Altman Chaz Chandler wrote: > Hi all, > We have a multi-site setup with OpenVPN and are evaluating technologies for > serving files to local users and across the vpn. From what I've read, > OpenAFS is a good match for our low-bandwidth vpn links, but in the actual > implementation it isn't working out. > > Background: > We've implemented a bridged OpenVPN multi-site network via UDP. The vpn has > not been specifically optimized for bandwidth, but that is probably a > discussion for another forum. We are currently seeing about 26KBps sustained > across the links. > Our OpenAFS trial setup has two file servers, one with an RW volume and both > with RO volumes of the RW one. > > The Problem: > In our simple tests, we made a change to the RW volume and attempted a > release. In the case where both servers are at the same site (and therefore > have the full lan bandwidth), a vos release works perfectly. In the case > where the two servers are at different sites, the vos release fails for all > practical purposes: that is, it never finishes and there doesn't seem to be > any serious amount of communication across the vpn between the two servers. > There are no relevant error messages in the afs logs, except for the every > 30-second info/warning messages about the vos release continuing. There are > obviously firewalls involved when operating across the vpn, but it is a > fully-bridged network and an analysis of dropped packets at the firewalls and > the file server machines does not show anything related to AFS. > > Our questions: > Where should we go from here? Is our vpn bandwidth too low to support > openafs? Is there some additional analysis to perform? Is there a better > afs setup to use? Any hints on vpn tweaks to resolve the issue? > > Thanks in advance, > -Chaz Chandler > _______________________________________________ > OpenAFS-info mailing list > [email protected] > https://lists.openafs.org/mailman/listinfo/openafs-info
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