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The Network and the
Role of Tools
January 6, 2006
Based on work by DoIT Network
Services, UW-Madison
Ron Kraemer, Deputy CIO
The Campus Network was…
• ATM LANE with 5 or 6 routers.
• Centrally-managed configurations for 5075 devices.
• Campus departments administered their
own local networks (no qualification
process).
• “Hodgepodge” of hardware, software,
procedures and network designs.
The Campus Network is…
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Standardized on Cisco equipment.
10 Gb/s backbone.
1 Gb/s departmental connections.
A centrally-purchased and centrallymanaged core network.
• Embracing department engagement.
Campus Network Details
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Nearly 900 Cisco network devices.
A few Juniper and NetScreen devices.
49,700+ managed ports.
The number of managed buildings,
devices, and ports grows daily.
• Common network management tools.
Network Management Strategy
Network
Management
By
Workgroup
By
Building
Central
Collaborative
Delegated
Hybrid
Pending (buildings)
13
177
16
24
7
113
4
8
24
Total
230
156
Data current as of December 2005
Key Strategies and Tools
• Sustainable funding model
• Continuous communications
• Campus-wide wireless service with distributed guest
account administration
• 24x7 network operations center
• Relationship with UW Police and Physical Plant
• Continually update tools
• Empower department IT staff to manage some things
that are important to them using a powerful set of webbased network monitoring and administration tools
AANTS: Authorized Agent Network
Tool Suite
• Loosely-coupled set of web-based utilities for network
administration.
• Tools are team-developed in-house, optimized toward
local networking practices, driven by user need.
• About 244 trained network administrators.
• Allow users (campus LAN administrators and network
engineers) to manage network devices, change
device configurations, troubleshoot, inspect traffic
data, coordinate with users, and perform other
network management tasks.
LookingGlass
• Run command-line operations on
devices and view results.
• View ethernet switch logs.
• Useful for troubleshooting.
NetStats
• Graph router interface and switch port
statistics.
• Time-series summary graphs displaying
different types of traffic statistics at the
campus network border.
• Searchable interface to traffic statistics.
• Uses free tools (like MRTG) to gather
and present stats
NetWatch
• Locate a host given a MAC or IP
address.
• Discover which devices are
connected to a specific switch.
EdgeConf
• Configure device ports (2,079 port
changes 1/4/2006).
• Perform multiple port changes as one
transaction.
• Examine switch port configurations and
other switch information.
• Users can only change devices/ports for
which they are authorized.
VlanFinder
• Discovers all currently active VLANs.
• User selects one or more VLANs.
• Display devices and ports on which the VLANs are
active.
• Display VLAN attributes:
– Configuration of routed VLAN interfaces
– Any trunk allowed VLANs
– VLAN Spanning Tree Protocol priorities
• Device names and ports will be hot-linked (where
applicable) to EdgeConf.
MailByDevice
• Select one or more network devices.
• Find all VLANs on each device.
• Get all technical and administrative contacts for each
VLAN from the WiscNIC database.
• User can compose an email message.
• Message will be mailed to all users.
• Used to alert users when certain devices are going to
be affected by NS actions.
CodePusher
• Push commands, operating code, or configuration
code to selected network devices.
–
–
–
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Run command-line directives (e.g. ‘show int’).
Upgrade system software.
Modify device configurations.
Manage ACLs.
• Parallelized for maximum efficiency.
• Can specify a delayed device restart date/time.
• Parses results into log files which can be viewed from
the web browser .
• Performs error-checking.
• Reports results via email.
Summary
• Most network administrators throughout
campus feel empowered.
– Users manage their local networks.
– Users determine tools emphasis and direction.
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Improved campus relations.
Improved security management.
“Cost-smart” for campus.
Enables more effective response to
challenges (security) and opportunities
(better services).