Then the interfaces with ifindexes from 257 through 280 should be recognized as switch ports by NAV (the ifindex numbers should be available in the interfaces report from >before).
If this isn't the case, you should check to see if ipdevpoll.log contains any errors related to this switch (and when viewing the ipdevinfo page for the switch, what does it say is the >"last updated" time?).
-- Morten Brekkevold UNINETT
Those interfaces are so called uplink interfaces to connect the switch to the network, still those interfaces doesn't show up as switch ports.
I checked the ipdevpoll.log, but besides a warning about DNS it doesn't give any error:
cat ipdevpoll.log |grep '172.17.205.17' 2012-03-22 10:54:16,555 [WARNING plugins.dnsname.dnsname] [inventory 172.17.205.17] DNS lookup error for 172.17.205.17: DNSNameError 2012-03-22 10:54:16,555 [WARNING plugins.dnsname.dnsname] [inventory 172.17.205.17] Unable to find PTR record for 172.17.205.17 (17.205.17.172.in-addr.arpa.) 2012-03-22 10:54:16,601 [WARNING plugins.typeoid.typeoid] [inventory 172.17.205.17] Netbox has changed type from unknown to unknown (sysObjectID 1.3.6.1.4.1.11.2.3.7.11.33.4.1.1) 2012-03-22 11:04:16,457 [WARNING plugins.dnsname.dnsname] [inventory 172.17.205.17] DNS lookup error for 172.17.205.17: DNSNameError 2012-03-22 11:04:16,457 [WARNING plugins.dnsname.dnsname] [inventory 172.17.205.17] Unable to find PTR record for 172.17.205.17 (17.205.17.172.in-addr.arpa.) 2012-03-22 17:04:16,666 [WARNING plugins.dnsname.dnsname] [inventory 172.17.205.17] DNS lookup error for 172.17.205.17: DNSNameError 2012-03-22 17:04:16,666 [WARNING plugins.dnsname.dnsname] [inventory 172.17.205.17] Unable to find PTR record for 172.17.205.17 (17.205.17.172.in-addr.arpa.) 2012-03-22 17:59:36,310 [WARNING plugins.dnsname.dnsname] [inventory 172.17.205.17] DNS lookup error for 172.17.205.17: DNSNameError 2012-03-22 17:59:36,311 [WARNING plugins.dnsname.dnsname] [inventory 172.17.205.17] Unable to find PTR record for 172.17.205.17 (17.205.17.172.in-addr.arpa.) 2012-03-22 23:59:34,170 [WARNING plugins.dnsname.dnsname] [inventory 172.17.205.17] DNS lookup error for 172.17.205.17: DNSNameError 2012-03-22 23:59:34,170 [WARNING plugins.dnsname.dnsname] [inventory 172.17.205.17] Unable to find PTR record for 172.17.205.17 (17.205.17.172.in-addr.arpa.) 2012-03-23 05:59:36,293 [WARNING plugins.dnsname.dnsname] [inventory 172.17.205.17] DNS lookup error for 172.17.205.17: DNSNameError 2012-03-23 05:59:36,293 [WARNING plugins.dnsname.dnsname] [inventory 172.17.205.17] Unable to find PTR record for 172.17.205.17 (17.205.17.172.in-addr.arpa.)
I have added 2 screenshots how it shows up in nav: