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Configuring Frame Relay Services
2-18
117376-C Rev. 00
In this example, the bridge receives data from site A. If the bridge does not
recognize the destination address, it tries to direct traffic through another bridge
port. However, without hybrid access mode configured, the frame relay bridge
port views the paths to site A and site B as the same path. Because the bridge does
not send out data on the same port from which it just received data, the bridge
does not direct the data to site B. In this case, you should use hybrid access mode.
If you define the PVCs in hybrid mode (see Figure 2-6
on page 2-17), each PVC
acts as a separate bridge port. This enables the bridge running on the frame relay
interface to view the traffic from site A as arriving on a different port than that of
site B. When the bridge sends out data, it sends it out from all ports, including the
port that has access to site B. Therefore, data from site A can reach site B.
You configure hybrid mode by enabling the hybrid mode PVC parameter. For
instructions, see “Configuring Hybrid Mode for PVCs” on page 3-20.
Source Routing
Source routing is the method by which a bridge sends data across two networks.
The router supports source routing over frame relay networks, using RFC 1490
standard frame relay data encapsulation.
To configure source routing, see Configuring Bridging Services.
RFC 1490
RFC 1490 defines the encapsulation method for sending data across a frame relay
network. Bay Networks routers implement RFC 1490 for all protocols that Bay
Networks supports over frame relay networks.
Address Resolution for PVCs
Address resolution for PVCs maps a remote network address such as an IP
address to a local DLCI number. For most protocols that you configure for a frame
relay interface, the router performs address resolution automatically. However, IP,
AppleTalk, and VINES
use the Address Resolution Protocol (ARP). ARP
dynamically generates an ARP table of addresses and DLCI numbers by sending
messages back and forth to each network node to gather address information. This
process increases broadcast traffic across the network.
- Configuring 1
- Frame Relay Services 1
- Trademarks 2
- Restricted Rights Legend 2
- Statement of Conditions 2
- Contents 5
- 117376-C Rev. 00 10
- About This Guide 15
- Conventions 16
- Acronyms 17
- Bay Networks Customer Service 18
- How to Get Help 19
- Chapter 1 21
- Starting Frame Relay 21
- Configuring PVCs and SVCs 26
- Configuring an SVC 27
- Chapter 2 31
- Frame Relay Overview 31
- Introduction to Frame Relay 32
- Permanent Virtual Circuits 33
- Switched Virtual Circuits 33
- PVC and SVC Comparison 34
- Frame Relay Packets 35
- . Note, however 36
- Management Protocols 37
- BYS0037A 38
- LAPF Operational States 39
- SVC Signaling 41
- Call Setup 42
- Message Processing 43
- Frame Relay Service Records 44
- Frame Relay Access Modes 45
- Direct Access Mode 46
- Hybrid Access Mode 46
- Source Routing 48
- RFC 1490 48
- Address Resolution for PVCs 48
- Address Resolution for SVCs 49
- Traffic Control 50
- Data Compression 51
- Data Encryption 51
- Protocol Prioritization 51
- Traffic Shaping 53
- Quality of Service 55
- Traffic Shaping for SVCs 57
- Incoming 59
- Outgoing 59
- CIR Configuration Guidelines 60
- WCP and CIR Enforcement 60
- Oversubscribing the Interface 62
- X.213 Priority for SVCs 64
- Inactivity Timing for SVCs 64
- Multiline for PVCs 65
- PVC Pass-Through 67
- Frame Relay Dial Services 68
- Caution: 71
- Selecting a Management Type 72
- Selecting a DLCI Address Type 74
- Selecting Address Length 74
- Monitoring the Connection 76
- Polling Interval 77
- Full Enquiry Interval 77
- Customizing PVCs 81
- To delete PVCs: 87
- To move PVCs: 87
- Enabling Multicast 88
- Configuring PVC Pass-Through 90
- <integer> 100
- Enabling Compression for PVCs 102
- Using the BCC 103
- Using Site Manager 103
- Customizing SVCs 105
- For example: 107
- To delete service records: 107
- Call Screening and Blocking 108
- Disabling SVCs 112
- Disconnecting Active SVCs 114
- Setup Timer 121
- <value> 126
- (continued) 128
- Congestion Control 129
- Congestion Timer 130
- Congestion Counter 130
- Congestion Method 131
- To enable congestion control 134
- To enable traffic shaping 139
- To disable compression: 141
- To set X.213 priority value 143
- Deleting Frame Relay 144
- Customizing Frame Relay 145
- Appendix A 147
- Site Manager Parameters 147
- Figure A-2 148
- SVC LAPF Parameters 157
- SVC Signaling Parameters 163
- Parameters for PVCs 168
- PVC Service Record Parameters 172
- SVC Service Record Parameters 180
- SVC Options Parameters 186
- WHERE DOES THIS PARAMETER GO? 200
- Appendix B 201
- Table B-1. RIP Parameters 202
- Appendix C 209
- Monitoring Frame Relay Using 209
- BCC show Commands 209
- Commands for Frame Relay 210
- <option> 212
- <dlci> 215
- <name> 215
- ] [-service 216
- <multiline_name> 223
- <name> 228
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