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The H3C S12500-X documentation set includes 15 configuration guides. These guides describe the software features for the H3C S12500-X Switch Series and guide you through the software configuration procedures. These guides also provide configuration examples to help you apply software features to different network scenarios.
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Convention Description be entered 1 to n times. A line that starts with a pound (#) sign is comments. GUI conventions Convention Description Window names, button names, field names, and menu items are in Boldface. For Boldface example, the New User window appears; click OK. >...
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Configuring TRILL Transparent Interconnect of Lots of Links (TRILL) uses IS-IS to provide transparent Layer 2 forwarding. Overview TRILL combines the simplicity and flexibility of Layer 2 switching with the stability, scalability, and rapid convergence capability of Layer 3 routing. All these advantages make TRILL very suitable for large flat Layer 2 networks in data centers.
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Figure 1 TRILL data frame format Table 1 describes the fields in the TRILL header. Table 1 TRILL header fields Field Description Ethertype The Ethertype is fixed to TRILL. Version number, which is 0. When an RB receives a TRILL frame, it checks the V field and drops the frame if the V field is not 0.
How TRILL works TRILL establishes and maintains adjacencies between RBs by periodically advertising Hello frames, distributes LSPs among RB neighbors, and generates an LSDB for all RBs in the network. Based on the LSDB, each RB uses the SPF algorithm to calculate forwarding entries destined to other RBs. TRILL forwarding mechanisms Different types of frames are forwarded using different forwarding mechanisms.
Multi-destination frame forwarding mechanism In a TRILL network, RBs perform the following operations: • Compute a TRILL distribution tree for each VLAN according to the LSDB. Use the TRILL distribution tree to guide the forwarding of multi-destination frames, which include •...
For more information about spanning tree protocols, see Layer 2—LAN Switching Configuration Guide. H3C recommends not enabling loop detection on TRILL ports, because TRILL networks prevent loops • from being generated. For more information about loopback detection, see Layer 2—LAN Switching Configuration Guide.
Tasks at a glance (Optional.) Configuring the link type of a TRILL port (Optional.) Configuring the DRB priority of a TRILL port (Optional.) Configuring the link cost for a TRILL port (Optional.) Configuring the announcing VLANs and designated VLAN (Optional.) Configuring TRILL timers (Optional.) Adjusting LSP parameters...
Figure 4 Two TRILL neighbors are established for a port (1) RB 1 Traditional Ethernet switch RB 2 RB 3 TRILL enabled port Figure 5 Two TRILL neighbors are established for a port (2) Configuration procedure To enable TRILL: Step Command Remarks Enter system view.
the highest priority uses the nickname. When RBs have the same priority, the RB with the highest system ID uses the nickname. The system automatically assigns new nicknames to the other RBs. If you set a new different system ID for an RB, the system resets the TRILL process. To configure the system ID and nickname for an RB: Step Command...
Step Command Remarks Enter system view. system-view Enter Layer 2 Ethernet or interface interface-type aggregate interface interface-number view. Configure the DRB By default, the DRB priority of a TRILL port is trill drb-priority priority priority of a TRILL port. Configuring the link cost for a TRILL port The link cost of a TRILL port can be automatically calculated by the system or manually configured: When a link cost is manually configured, the manually configured link cost takes effect regardless •...
The concepts and symbols used in this section are explained as follows: Enabled VLAN—VLAN enabled on the port. • Forwarding VLAN—VLANs for which an RBridge port is appointed VLAN forwarder on the port. • • ∩ and ∪—Set operation symbols. ∩ indicates set-theoretic intersection, and ∪ indicates set-theoretic union.
Step Command Remarks Enter system view. system-view Enter Layer 2 Ethernet interface interface-type or aggregate interface interface-number view. The default setting is 10 seconds. This command sets the Hello interval for the Configure the Hello trill timer hello interval RB. The Hello interval of the DRB is 1/3 of the interval.
To adjust LSP-related parameters: Step Command Remarks Enter system view. system-view Enter TRILL view. trill Set the LSP maximum timer lsp-max-age time The default setting is 1200 seconds. age. Set the LSP refresh timer lsp-refresh time The default setting is 900 seconds. interval.
Step Command Remarks Enter system view. system-view Enter TRILL view. trill By default, the maximum SFP calculation timer spf maximum-interval interval is 10 seconds, the minimum SPF Set the SPF calculation [ minimum-interval calculation interval is 10 milliseconds, and interval for TRILL. [ incremental-interval ] ] the SFP calculation incremental interval is 20 milliseconds.
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TRILL distribution trees support Equal Cost Multiple Path (ECMP), also known as multicast ECMP. When multicast ECMP is disabled, because the topologies of TRILL distribution trees are different, traffic can be load shared. However, equal-cost links are not used for load sharing. When N equal-cost links exist in the network, each TRILL distribution tree selects the link with the largest pseudo-node ID for forwarding packets.
Enabling logging of TRILL neighbor changes Perform this task to output logs of TRILL neighbor changes to the configuration terminal. To enable logging of TRILL neighbor changes: Step Command Remarks Enter system view. system-view Enter TRILL view. trill Enable logging of TRILL By default, logging of TRILL neighbor changes log-peer-change enable neighbor changes.
Configuring TRILL GR Graceful Restart (GR) ensures the continuity of packet forwarding when a protocol restarts or an active/standby switchover occurs. The device on which a protocol restarts or an active/standby switchover occurs advertises the restart status to the neighbors, and allows the neighbors to re-establish connections.
Task Command Display information about the TRILL display trill unicast-route [ nickname nickname ] [ verbose ] unicast routing table. Clear dynamic running statistics of reset trill the TRILL process. TRILL configuration example Network requirements As shown in Figure 7, configure TRILL in the Layer 2 data center network as follows: Enable TRILL on the downlink ports of access layer devices to connect terminal devices to the TRILL •...
[RB9] trill [RB9-trill] tree-root priority 65532 [RB9-trill] trees calculate 4 [RB9-trill] quit Verifying the configuration Suppose that the nicknames of RB 1 through RB 9 are 0x5801 through 0x5809, respectively. Use display trill unicast-route to display the TRILL unicast routing table. For example: # Display brief information about all entries in the TRILL unicast routing table on RB 1.
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Root: 0x5806 LocalRcvFlag: True List of VLANs: List of outgoing ports: XGE1/0/2...
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