open network administrator (ona) presented by bruce campbell
TRANSCRIPT
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Open Network Administrator (ona)
Presented by Bruce Campbell
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Onaoverview
Web based network management tool Administrators interact with ona over the web Ona interacts with network devices. Device configurations, permissions, etc. stored in
mysql database.
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Ona overview
Ona users
ona
switch
switch
router
AP
etc
database
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Without ona
Network staffswitch
switch
router
ap
etc
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Onakey features
Provides a common interface to a number of different makes and models of switches.
Supports delegation through granular access control. Logs all changes Traffic graphs Saves switch configurations to tftp server E-mails a daily summary of changes and diff report. IP/MAC search extensible – if you can think it, you can build it… or ask me to
build it.
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Some details
Approximately 10,000 lines of php Uses net_snmp library (formerly ucd-snmp) Uses snmp primarily, and telnet for some functions I could
not figure out via snmp. Platform independent Currently hosted on 2.4GHz PC running FreeBSD, Apache web
server, .htaccess authentication to ADS and Nexus. telnet script features written using php socket library. Supports Nortel Baystack, Extreme, Cisco 2900/3500, Cisco
2950/3550, Avaya AP. Limited support for Cisco 1900 and Enterasys AP.
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Use at UW
Used by Arts, CS, Engineering, Math, Science to (help) manage approximately 250 switches and 150 Aps.
Most visible use is “day to day” activities, ie configure port speed, duplex, vlan, find a machine, etc.
Behind the scenes, ona saves configs, cvs config, graphs traffic, sends alerts upon device up/down/reboot, equipment inventory, tracks ARP/MAC changes, daily report, etc.
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
End user features
Ona has some features for end users Whereami (works on switch port or AP). Shows
port configuration, traffic graph. Java bandwidth test (complete with java nuances)
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Intro screen
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
MAC/IP search
Ona queries router ARP tables 5 times daily. Queries switch MAC tables 5 times daily. (takes 30-40 minutes for
250 switches) Queries AP MAC tables every 5 minutes. (30 seconds for 150 APs) Everything goes in the database… forever. And everything is
logged. Search tools consult the database (ie. not real time search of
device MAC tables) Button for real time update of the MAC table from a switch or AP
(one at a time only). Real time AP MAC search Future: smartsearch will track down a MAC from a starting point
using some cleverness to avoid searching all switches.
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Search tool
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
History part of search tool
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Traffic Graphs
Maintained on all ports with rrdtool, 5 minute interval.
Also track number of wireless users on each AP, and total for Aps for each orgunit.
Real time graphs. Port or switch, 10 second update. Useful for getting a snapshot of activity.
TopPorts button shows busiest ports in last 20 seconds.
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Port graphs(5 graphs of various intervals)
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Switch configurations
Switch configs saved to tftp server each night Can be pushed to alternate tftp or ftp servers as
well Can create a tar ball of configs for automated
download to a network admins laptop (instructions included for cygwin procedure and scheduled tasks). Who gets what is configurable.
Difference between yesterdays config e-mailed in daily report (minus sensitive information)
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Switch config view
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
CVS
Switch configurations stored in cvs server (plain text configs only)
Makes for easy comparison between arbitrary dates, going back to an old version.
Two cvs trees. One with real configs, one with configs minus sensitive info (passwords etc). Latter available via cvsweb to ona admins.
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Cvsweb diffbetween versions
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Daily report
Admin changes Port changes Diff report Summary of alerts Sent to relevant ona users only. Ie. Math guys
don’t get Arts report.
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Daily report
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
telnet feature
Separately enabled Allows batch telnet commands to devices which
support a command line interface After a telnet command is issued, switch can be
optionally “Sync’ed”, next time someone accesses it.
Option to send telnet commands in daily report or not, and to trigger saving the config.
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
telnet window
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Vlan conversion tool(part of telnet window if Cisco switch and all ports on vlan 1)
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Access control
Done through groups Each admin and device has a primary group. Admins and devices can be added to further groups. Ports can be added to groups Vlans are members of groups. To edit a port, an admin must have a group in common with the
port or switch. Use of regular expressions simplifies listing which switches are in
which groups. To put a port on a vlan, the admin must have a group in common
with that vlan. To edit a trunk, an admin must not have “denytrunkchanges”
setting, and must have permission on all vlans on the trunk.
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Device groups window
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
More access control
All tools (buttons) can be selectively disabled, or all disabled and some selectively re-enabled.
The ability to set port settings can be similarly restricted.
For example, can give permission to Search only, and disable/enable port only.
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Administrative interface
Typically one ona user per faculty is an ona administrator.
They can add switches, users, configure permissions.
Cannot delete other admins, or create more admins, depending on settings.
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Admin interface
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Admins table(note systemadmin setting)
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Adding a device
Add ipname, make, devicetype (switch, router or ap), telnet and snmp passwords.
The passwords are encrypted in the ona database First attempt to access newly added device will
force a “Sync”.
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Device add window
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Few other odds and ends
When a port is disabled, an optional message can be entered which is sent to the DNS contact, admin.
When a vlan is created, it is named based on UW convention.
Comment field for each port (stored in database, not the same as port description)
Configuration translator
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Configuration translator(converts port settings between
vendors)
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See ?
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Main Screen(note sort buttons)
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Sorted by version(example)
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Switch Screenexample 1
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Printable version
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Some buttons
Sync : pull config from switch into ona (done daily automatically)
Freshen : pull port states only (happens automatically if over an hour since last time)
Save : save settings to NVRAM (ona does this automatically if changes are made and not saved, once per day)
UpdateMacs : pull MAC table (done 5 times daily automatically, typically)
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Switch screenexample 2 (note trunks)
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Showing MACs on a trunk(note show naa users button)
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Ping tool
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
TopPorts tool
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Alerts(e-mailed also)
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Showing changes on a switch
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Port edit screen(note save now vs. later)
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Port edit screen(trunk)
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Access Point view(note 1 AP down)
Users column is MACs seen in last 24 hours
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Usage graphs part of AP view
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Single AP view
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Showing users on an AP
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telnet command on multiple Aps
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Preferences window(note Mail me changes field)
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Where am I ?(wired)
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Where am I ?(wireless)
(note update button)
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Java Bandwidth test(to endpoint in Eng)
(well, I ran this from home)
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
To have an unsupported device added to ona…
You figure out all the snmp, and test it with the command line net-snmp tools.
I will write the code. (or you can if you’d prefer) Look at nortel.php in the ona package as an example of what
you need to figure out. You don’t need to write the code, just figure out the logic and oids. Functionality needed is:
function set_nortel_port_tagged_vlans_via_snmp( $d, $portname, $olduntaggedvlan,function set_nortel_port_untagged_vlan_via_snmp( $d, $portname, $oldvlan, $vlan,function adjust_nortel_vlan_members( $d, $vlan, $remove_this_port, $add_this_port)function set_nortel_port_trunkmode_via_snmp( $d, $portname, $trunkmode,function get_nortel_vlan_configuration_via_snmp( $d, $signature )function get_nortel_port_speeds_and_duplexes_via_snmp( $d, $signature )function set_nortel_port_speed_duplex_via_snmp( $d, $portname, $speed, $duplex )function get_nortel_model_and_version_via_snmp( &$d )function nortel_telnet_login( $d, $contin )function nortel_telnet_logout()function create_nortel_vlan_if_needed( $d, $vlan )
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WatITis | Supporting UW’s Mission Through I.T. | December 7, 2004 | Open Network Administrator
Future ideas
SmartSearch (as mentioned earlier) Network topology diagram. Should be doable as
ona knows MAC addresses of all switches and which trunks they are on.
syslog integration