8.3.17.0 - Force10 Networks

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www.dell.com | support.dell.com 154 | Link Aggregation Server-Facing LAGs Server-facing ports are configured as individual ports by default. If a server NIC is configured for LACP-based NIC teaming, server-facing ports are automatically configured as part of dynamic LAGs. The LAG range 1 to127 is reserved for server-facing LAGs. Once the Aggregator receives LACPDU from server-facing ports, the information embedded in the LACPDU (remote-system ID and port key) is used to form a server-facing LAG. The LAG/port-channel number is assigned based on the first available number in the range 1 to 127. For each unique remote system-id and port-key combination, a new LAG is formed and the port automatically becomes a member of the LAG. All ports with the same combination of system ID and port key automatically become members of the same LAG. Ports are automatically removed from the LAG if the NIC teaming configuration on a server-facing port changes or if the port goes operationally down. Also, a server-facing LAG is removed when the last port member is removed from the LAG. The benefit of supporting a dynamic LAG is that the Aggregator's server-facing ports can toggle between participating in the LAG or acting as individual ports based on the dynamic information exchanged with a server NIC. LACP supports the exchange of messages on a link to allow their LACP instances to: • Reach agreement on the identity of the LAG to which the link belongs. • Attach the link to that LAG. • Enable the transmission and reception functions in an orderly manner. • Detach the link from the LAG if one of the partner stops responding. LACP Modes The Aggregator supports only LACP active mode as the default mode of operation. In active mode, a port interface is considered to be not part of a LAG but rather in an active negotiating state. A port in active mode automatically initiates negotiations with other ports by sending LACP packets. If server-facing ports are configured for LACP-based NIC teaming, LACP negotiations will take place to aggregate the port in a dynamic LAG. If server-facing ports are not configured for LACP-based NIC teaming, a port will be treated as an individual port in the active negotiating state. Auto-Configured LACP Timeout LACPDUs are exchanged between port channel (LAG) interfaces to maintain LACP sessions. LACPDUs are transmitted at either at a slow or fast transmission rate, depending on the LACP timeout value configured on the partner system. The timeout value is the amount of time that a LAG interface waits for a PDU from the partner system before bringing the LACP session down. The default timeout is long-timeout (30 seconds) and is not user-configurable on the Aggregator.
LACP Example Figure 12-1 shows an example of how LACP operates in an Aggregator stack by auto-configuring the uplink LAG 128 for the connection to a ToR switch and a server-facing LAG for the connection to an installed server that is configured for LACP-based NIC teaming. Figure 12-1. LACP Operation on an Aggregator Link Aggregation | 155
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Dell PowerEdge Configuration Guide
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October 2012 | iii
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1 About this Guide . . . . . . . .
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Data Center Bridging Exchange Proto
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Displaying VLAN Membership . . . .
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Read Managed Object Values . . . .
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Troubleshooting Packet Loss . . . .
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About this Guide Objectives 1 This
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Before You Start Default Settings 2
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DCB Support DCB enhancements for da
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The untagged VLAN of a server-facin
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Configuration Fundamentals 3 The De
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Navigating CLI Modes The FTOS promp
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Figure 3-5. Undoing a command with
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Table 3-2. Short-Cut Keys and their
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Multiple Users in Configuration Mod
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Getting Started This chapter contai
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Uplink Ports Ports 33 to 56 are ext
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Step Task (continued) Note: Termina
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Figure 4-4. Completed Boot Process
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Figure 4-6. Completed Boot Process
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Access the Aggregator Remotely Conf
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Dell Force10 recommends using the e
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Figure 4-10 shows an example of usi
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To view the contents of a file, fol
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Figure 4-14. Alternative Storage Lo
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Aggregator Management This chapter
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Changing System Logging Settings Yo
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Configuring a UNIX Logging Facility
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Enabling the FTP Server To enable t
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Recovering from a Forgotten Passwor
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Figure 5-5. Recovering from a Faile
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Data Center Bridging (DCB) 6 On an
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Figure 6-1. Priority-Based Flow Con
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Data Center Bridging Exchange Proto
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QoS dot1p Traffic Classification an
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How Enhanced Transmission Selection
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DCB Policies in a Switch Stack A DC
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Note: On a DCBX port, application p
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Auto-Detection of the DCBX Version
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DCBX Error Messages An error in DCB
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Figure 6-7. show interfaces pfc sum
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Table 6-3. show interface pfc summa
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Table 6-4. show interface ets detai
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Figure 6-12. show interface dcbx de
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Example: PFC and ETS Operation This
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Table 6-8. Example: priority group-
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Skippy812 Dynamic Host Configuratio
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Assigning an IP Address Using DHCP
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Releasing and Renewing DHCP-based I
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Figure 7-5. DHCP Client: Debug Mess
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DHCP Client on a Management Interfa
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FIP Snooping 8 FIP snooping is auto
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Figure 8-1. FIP discovery and login
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The following sections describe how
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FIP Snooping Prerequisites On an Ag
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Figure 8-3. show fip-snooping sessi
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Figure 8-7. show fip-snooping stati
Page 117 and 118: Table 8-5. show fip-snooping statis
Page 119 and 120: FIP Snooping Example Figure 8-11 sh
Page 121 and 122: Internet Group Management Protocol
Page 123 and 124: IGMP Version 3 Conceptually, IGMP v
Page 125 and 126: Leaving and Staying in Groups Figur
Page 127 and 128: Figure 9-6. show ip igmp groups Com
Page 129 and 130: Interfaces 10 This chapter describe
Page 131 and 132: Viewing Interface Information You c
Page 133 and 134: Disabling and Re-enabling a Physica
Page 135 and 136: The Aggregator supports the managem
Page 137 and 138: Configuring a Static Route for a Ma
Page 139 and 140: Port-Based VLANs Port-based VLANs a
Page 141 and 142: Displaying VLAN Membership To view
Page 143 and 144: Adding an Interface to an Untagged
Page 145 and 146: Port channels can contain a mix of
Page 147 and 148: Figure 10-12. show interface port-c
Page 149 and 150: Create a Multiple-Range Figure 10-1
Page 151 and 152: Maintenance Using TDR The time doma
Page 153 and 154: MTU Size The Aggregator auto-config
Page 155 and 156: Figure 10-19. show interfaces statu
Page 157 and 158: Figure 10-21 shows the auto-negotia
Page 159 and 160: Clearing Interface Counters The cou
Page 161 and 162: iSCSI Optimization 11 An Aggregator
Page 163 and 164: If no iSCSI traffic is detected for
Page 165 and 166: Displaying iSCSI Optimization Infor
Page 167: Link Aggregation The Aggregator aut
Page 171 and 172: Figure 12-3. show lacp 128 Command
Page 173 and 174: Figure 12-5. show interfaces port-c
Page 175 and 176: Layer 2 The Aggregator supports CLI
Page 177 and 178: Figure 13-1. Redundant NICs with NI
Page 179 and 180: Link Layer Discovery Protocol (LLDP
Page 181 and 182: Organizationally Specific TLVs Orga
Page 183 and 184: TIA Organizationally Specific TLVs
Page 185 and 186: LLDP-MED Network Policies TLV A net
Page 187 and 188: LLDP Operation On an Aggregator, LL
Page 189 and 190: Figure 14-10. Viewing All Informati
Page 191 and 192: Debugging LLDP The debug lldp comma
Page 193 and 194: Table 14-8. LLDP System MIB Objects
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Page 197 and 198: Port Monitoring 15 The Aggregator s
Page 199 and 200: Figure 15-2 shows ports 0/25 and 0/
Page 201 and 202: In Figure 15-4, the host and server
Page 203 and 204: 16 Simple Network Management Protoc
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Page 207 and 208: Figure 16-6 shows the output for an
Page 209 and 210: Use dot3aCurAggFdbTable to fetch th
Page 211 and 212: Monitor Port-channels To check the
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Page 215 and 216: Stacking Overview 17 An Aggregator
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Stacking Port Numbers By default, e
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Cabling Procedure The following cab
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Resetting a Unit on a Stack Use the
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Figure 17-19. show system Command E
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Troubleshooting a Switch Stack Trou
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Figure 17-27. show hardware stack-u
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Stack Unit in Card-Problem State Du
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Upgrading a Single Stack Unit Upgra
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Broadcast Storm Control 18 On the A
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System Time and Date 19 The Aggrega
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Setting the Time Zone Universal tim
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Setting Recurring Daylight Saving T
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Uplink Failure Detection (UFD) Upli
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Figure 20-2. Uplink Failure Detecti
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Show Command Syntax Description sho
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Debugging UFD on an Interface To en
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Upgrade Procedures 21 To view the r
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Debugging and Diagnostics The chapt
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Broadcast, unknown multicast, and D
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Auto-configured VLANs do not exist
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Figure 22-2. show system stack-unit
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Figure 22-3. Taking a Stack Unit Of
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Table 22-2. show hardware Commands
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Recognize an Over-Temperature Condi
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The simple network management proto
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Deciding to Tune Buffers Dell Force
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Figure 22-11. Displaying Buffer Pro
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Sample Buffer Profile Configuration
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Figure 22-14. Displaying Buffer Sta
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Displaying Stack Port Statistics Th
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Figure 22-19. Mini application core
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Standards Compliance This chapter c
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General IPv4 Protocols RFC# Full Na
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Network Management (continued) RFC#
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