H3C S5560X-EI Series Configuration Manual

Also see for S5560X-EI Series: Command reference Installation guide

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H3C S5560X-EI Series Configuration Manual Manual pdf 9 page image

3Working mechanismsThe VTEP uses the following process to forward an inter-site frame:1. Assigns the frame to its matching VXLAN if the frame is sent between sites.2. Performs MAC learning on the VXLAN's VSI.3. Forwards the frame through VXLAN tunnels.This section describes this process in detail. For intra-site frames in a VSI, the system performstypical Layer 2 forwarding, and it processes 802.1Q VLAN tags as described in "Access mode ofVSIs."Assignment of traffic to VXLANsTraffic from the local site to a remote siteThe VTEP uses an Ethernet service instance to match customer traffic on a site-facing interface. TheVTEP assigns customer traffic to a VXLAN by mapping the Ethernet service instance to a VSI.An Ethernet service instance is identical to an attachment circuit (AC) in L2VPN. An Ethernet serviceinstance matches a list of VLANs on a Layer 2 Ethernet interface by using a frame match criterion.The frame match criterion specifies the characteristics of traffic from the VLANs, such as taggingstatus and VLAN IDs.As shown in Figure 3, Ethernet service instance 1 matches VLAN 2 and is mapped to VSI A (VXLAN10). When a frame from VLAN 2 arrives, the VTEP assigns the frame to VXLAN 10, and looks up VSIA's MAC address table for the outgoing interface.Figure 3 Identifying traffic from the local siteTraffic from a remote site to the local siteWhen a frame arrives at a VXLAN tunnel, the VTEP uses the VXLAN ID in the frame to identify itsVXLAN.MAC learningThe VTEP performs source MAC learning on the VSI as a Layer 2 switch.• For traffic from the local site to the remote site, the VTEP learns the source MAC address beforeVXLAN encapsulation.• For traffic from the remote site to the local site, the VTEP learns the source MAC address afterremoving the VXLAN header.A VSI's MAC address table includes the following types of MAC address entries: