[nsp] DLSW explorer-wait-time

[Oliver Boehmer (oboehmer)]

Hi Danny,

interesting, a DLSW question on cisco-nsp ;-)

> Hello, Group.  This is for all you DLSW gurus out there.  With the
> explorer wait time for DLsw, if you have two peerings and you want to
> prefer one over the other to send data, will the lower explorer wait
> time be the preffered peer?  I think it is the lower wait time that
> is preffered. It think this because the router will connect to the
> one whose timer is configured to expire first.  Is my thinking
> correct? 

the global "dlsw timer explorer-wait-time <sec>" command basically
defers the peer selection for <n> seconds to allow for all explorer
responses to arrive. Then DLSW will choose among the peers based on
their cost. If you select your peers based on cost and your "primary"
peer usually responds later than the less-preferred peers, you want to
increase the explorer-wait-time. If you didn't, the first peer
responding would be selected, which might not be what you want.

So if you always want to prefer peer-a over peer-b, you can configure

dlsw remote-peer 0 tcp <peer-a> cost 2
dlsw remote-peer 0 tcp <peer-b> cost 4
dlsw timer explorer-wait-time 2

Another option would be to configure peer-b as a backup peer.

Take a look at
http://www.cisco.com/warp/public/cc/pd/ibsw/ibdlsw/tech/tadlt_rg.htm
(chapter "Advanced Features" and "Customization")

	oli