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DHCP, SLP, and Option 78 reference
Summit WM-Series WLAN Switch and Altitude Access Point Software Version 1.0 User Guide
174
Service Location Protocol (SLP) (RFC2608)
Service Location Protocol (RFC2608) is a method of organizing and locating the resources (such as
printers, disk drives, databases, e-mail directories, and schedulers) in a network. Using SLP, networking
applications can discover the existence, location and configuration of networked devices.
In larger installations, services will register their services with one or more Directory Agents, and clients
will contact the Directory Agent to fulfill requests for Service Location information.
Service Location Protocol consists of three cooperating services:
● User Agent (UA): A process working on the user's behalf to acquire service attributes and
configuration. The User Agent retrieves service information from the Service Agents or Directory
Agents.
● Service Agent (SA): A process working on the behalf of one or more services to advertise service
attributes and configuration.
● Directory Agent (DA): A process which collects information from Service Agents to provide a single
repository of service information in order to centralize it for efficient access by User Agents. There
can only be one DA present per given host.
When a service starts on the network, its Service Agent will query the DHCP server for Option 78 and
79 and will register itself appropriately.
DHCP Options for Service Location Protocol (RFC2610)
The Dynamic Host Configuration Protocol (RFC2131) provides a framework for passing configuration
information to hosts on a TCP/IP network.
Entities using the Service Location Protocol, Version 2 (RFC2608) and Service Location Protocol, Version
1 (RFC2165) need to obtain the address of Directory Agents in order to transact messages. The SLP
Directory Agent option described below (Option 78) is used to configure User Agents and Service
Agents with the location of Directory Agents in the network.
The SLP Scope Option (Option 79) provides an assignment of scope for configuration of SLP User and
Service Agents. This option takes precedence over both default and static scope configuration of SLP
agents. A scope is a set of services, typically making up a logical administrative group.
SLP Directory Agent Option (Option 78)
The SLP Directory Agent Option 78 specifies a list of IP addresses for SLP Directory Agents. Directory
Agents should be listed in order of preference.
The Length value must include one for the 'Mandatory' byte and include four for each Directory Agent
address which follows. The address of the Directory Agent is given in network byte order. The
'Mandatory' byte in the Directory Agent option may be set to either 0 or 1. If it is set to 1, the SLP User
Agent or Service Agent so configured must not employ either active or passive multicast discovery of
Directory Agents.
The Directory Agents listed in Option 78 must be configured with the a non-empty subset of the scope
list that the Agent receiving the Directory Agent Option 78 is configured with.
- Table of Contents 3
- Formatting conventions 10
- Documentation feedback 10
- Protocols and standards 11
- Regulatory information 11
- About this Guide 12
- Conventional wireless LANS 13
- Wireless AP 15
- Summit WM 15
- Wireless Controller 15
- Network traffic flow 18
- Network security 19
- Policy: packet filtering 21
- Mobility and roaming 21
- Availability 22
- Quality of Service (QoS) 22
- Data ports (4 or 2) 24
- Management ports 24
- Configuration steps: overview 31
- Enabling the product key 31
- Setting up the data ports 32
- Port Type or Function 34
- Setting up static routes 35
- Setting up OSPF Routing 36
- Define port exception filters 40
- 4 Altitude AP: startup 41
- Installing the Altitude APs 43
- Set the discovery timers 45
- Discovery and registration 46
- Registration after discovery 48
- Altitude AP access approval 49
- ● 802.11 b/g (2.4 GHz radio) 53
- ● 802.11a (5 GHz radio) 53
- Adding a Altitude AP manually 56
- Auto Cell software 58
- Configure Auto Cell software 59
- Altitude AP: startup 60
- Introduction 61
- What is a WM-AD? 62
- Topology of a WM-AD 62
- Filtering for a WM-AD 64
- Setting up a new WM-AD 66
- Global Settings for a WM-AD 68
- Topology for a WM-AD 71
- Use DHCP Relay for the WM-AD 74
- Topology for a WM-AD for AAA 75
- Authentication for a WM-AD 76
- ● No Captive Portal Support 80
- Captive Portal” on page 87) 81
- Accounting for a WM-AD 84
- RADIUS Policy for a WM-AD 84
- Filtering rules for a WM-AD 86
- Default Filter: Examples 93
- Multicast for a WM-AD 95
- Privacy for a WM-AD 96
- Privacy for a WM-AD for AAA 97
- A WM-AD for voice traffic 101
- Availability and Mobility 103
- Management users 111
- Network time 112
- Check Point event logging 113
- Setting up SNMP 115
- Setting SNMP Parameters 116
- Overview 123
- Summit Spy: running scans 125
- The Analysis Engine 126
- 11 Ongoing operation 131
- Altitude AP client management 133
- Client disassociate 134
- Client blacklist 135
- Health Checking 136
- Change the system log level 136
- Enable and configure Syslog 136
- Logs and alarms 141
- View the Logs 142
- View the Traces 142
- View the Audits 143
- Reports and displays 144
- View reports 146
- Glossary 147
- D (Continued) 149
- F (Continued) 151
- H (Continued) 152
- I (Continued) 153
- O (Continued) 156
- P (Continued) 157
- S (Continued) 160
- T (Continued) 162
- W (Continued) 164
- Altitude AP system states 168
- B CLI command reference 169
- CLI command reference 170
- RFC list 177
- 802.11 standards list 178
- Reference lists of standards 180
- E Support for Altitude AP 181
- F RADIUS Attributes 183
- RADIUS Accounting 184
- Account-Stop/Interim Packet 185
- Termination Codes 186
- G Logs and Events 187
- Logs and Events 188
- Critical 189
- CDR_COLLECTOR 191
- CONFIG_MANAGER 191
- EVENT_SERVER 192
- RADIUS_ACCOUNTING 194
- RADIUS_CLIENT 194
- RF_DATA_COLLECTOR 195
- RU_MANAGER 195
- SECURITY_MANAGER 196
- STARTUP_MANAGER 197
- STATS_SERVER 198
- ACCESSPOINT 200
- CPDP_AGENT_ID 203
- NSM_SERVER 205
- OSPF_SERVER 206
- PORT_INFO_J_MANAGER 206
- REDIR_ID 207
- H Regulatory Information 213
- Emissions 214
- FCC ID#: RJF-A3502 216
- Part 15 Unlicensed Antenna 217
- European Community 218
- European Spectrum Usage Rules 221
- Regulatory Information 222
- Declarations of Conformity 223
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