Cisco Systems DSC9148D8G48PK9 Manuel d'utilisateur Page 174
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6-4
Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
OL-29284-01, Release 6.x
Chapter 6 Configuring PortChannels
Information About PortChannels
Figure 6-3 PortChanneling and Trunking
PortChanneling and trunking are used separately across an ISL.
• PortChanneling—Interfaces can be channeled between the following sets of ports:
–
E ports and TE ports
–
F ports and NP ports
–
TF ports and TNP ports
• Trunking—Trunking permits carrying traffic on multiple VSANs between switches.
See the Cisco MDS 9000 Family NX-OS Fabric Configuration Guide.
• Both PortChanneling and trunking can be used between TE ports over EISLs.
Load Balancing
Two methods support the load-balancing functionality:
• Flow based—All frames between source and destination follow the same links for a given flow. That
is, whichever link is selected for the first exchange of the flow is used for all subsequent exchanges.
• Exchange based—The first frame in an exchange picks a link and subsequent frames in the exchange
follow the same link. However, subsequent exchanges can use a different link. This provides more
granular load balancing while preserving the order of frames for each exchange.
Figure 6-4 illustrates how source ID 1 (SID1) and destination ID1 (DID1) based load balancing works.
When the first frame in a flow is received on an interface for forwarding, link 1 is selected. Each
subsequent frame in that flow is sent over the same link. No frame in SID1 and DID1 utilizes link 2.
EISL 3
EISL 2
EISL 1
Port channel
and trunking
Switch 1 Switch 2
ISL 3
ISL 2
ISL 1
Switch 1 Switch 2
79939
Port channel
- Configuration Guide 1
- CONTENTS 3
- Contents 10
- OL-29284-01, Release 6.x 10
- New and Changed Information 13
- OL-29284-01 14
- Audience 15
- Organization 15
- Document Conventions 16
- Related Documentation 17
- Command-Line Interface 18
- Interfaces Overview 19
- Extended Credits 20
- FlexAttach 20
- Configuring Interfaces 23
- Interface Description 24
- Interface Modes 24
- Information About Interfaces 26
- Interface States 28
- • Configuration failure 30
- Graceful Shutdown 31
- Port Administrative Speeds 32
- Frame Encapsulation 32
- Beacon LEDs 33
- Speed LEDs 33
- Bit Error Thresholds 33
- SFP Transmitter Types 34
- TL Ports 35
- TL Port ALPA Caches 36
- Port Guard 36
- Port Monitor 37
- Port Monitor Port Guard 38
- Port Group Monitor 38
- Local Switching 38
- Management Interfaces 39
- Prerequisites for Interfaces 40
- Configuring Interface Modes 44
- Configuring 10-Gbps FC Mode 46
- Configuring Port Speed Group 48
- Specifying a Port Owner 49
- Configuring Beacon Mode 49
- Disabling Bit Error Threshold 50
- Configuring TL Ports 51
- Clearing the ALPA Cache 51
- Configuring Port Guard 52
- Configuring Port Monitor 53
- Enabling Port Group Monitor 57
- Creating VSAN Interfaces 60
- Command is Executed 71
- Mode F Command is Executed 72
- Configured for Mode FL 72
- Port Groups 81
- (continued) 82
- Port Rate Modes 83
- Dedicated Rate Mode 85
- Shared Rate Mode 86
- Modules 87
- Port Speed 88
- Dynamic Bandwidth Management 88
- Out-of-Service Interfaces 89
- Bandwidth Fairness 95
- Local Switching Limitations 97
- Port Index Limitations 97
- PortChannel Limitations 99
- Guidelines and Limitations 100
- Default Settings 103
- Configuring Port Speed 107
- Configuring Rate Mode 108
- Configuring Local Switching 114
- Detailed Steps 115
- Examples 115
- Prerequisites 115
- Enabling Bandwidth Fairness 118
- Disabling Bandwidth Fairness 119
- Restrictions 120
- Configuring Interface Buffers 129
- Performance Buffers 130
- Buffer Pools 130
- BB_Credit Buffers 134
- 1. ISL = E port or TE port 140
- Extended BB_Credits 145
- Configuring Trunking 155
- Trunking F Ports 156
- Key Concepts 157
- Trunking Protocols 157
- Trunk Modes 158
- Information About Trunking 159
- SANs1, 2, and 3 are o 160
- Figure 5-5 VSAN Mismatch 164
- Configuring Trunk Mode 166
- Save the configuration 169
- Configuring PortChannels 171
- PortChannels Overview 172
- E PortChannels 172
- F and TF PortChannels 173
- PortChanneling and Trunking 173
- Load Balancing 174
- PortChannel Modes 176
- PortChannel Deletion 177
- Interfaces in a PortChannel 177
- Compatibility Check 178
- PortChannel Protocols 179
- Channel Group Creation 180
- Autocreation 181
- Deleting PortChannels 188
- Forcing an Interface Addition 189
- NPV switch to ON: 196
- N Port Virtualization 197
- NPV Mode 200
- NP Ports 201
- NP Links 201
- Default Port Numbers 202
- NPV CFS Distribution over IP 203
- NPV Traffic Management 203
- DPVM Configuration Guidelines 205
- Configuring NPV 206
- Verifying NPV Configuration 209
- Verifying NPV 210
- FlexAttach Virtual pWWN 213
- Virtualization 214
- Mapping pWWN to Virtual pWWN 216
- Verifying the End Device 218
- Configuring Port Tracking 221
- Tracking Multiple Ports 225
- Monitoring Ports in a VSAN 225
- Numerics 229
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