Белая книга для Cisco Cisco Prime Network Services Controller Adaptor for DFA

 

 

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Autoconfiguration with vPC+ provides enhanced vPC+ synchronization of end-host-triggered configuration to help 

prevent inconsistent configuration states between the vPC+ peers. In deployments with the end-host connected 

through a PortChannel to a vPC+ pair of leaf switches, and also with a single-homed end-host recognized as a 

vPC+ orphan port, the autoconfiguration instantiation should maintain a consistent configuration on both vPC+ peer 

switches to prevent vPC+ and VLAN inconsistencies. For example, a VLAN inconsistency would be reported as a 

type-1 violation and would cause the suspension of that particular VLAN. 

The Cisco Fabric Service over Ethernet (CFSoE) Protocol on the vPC+ peer link is responsible for synchronizing 

the automatically allocated VLANs and Segment IDs during autoconfiguration instantiation to prevent vPC+ 

inconsistencies. 

The same is true for the locally allocated end-host-facing VLAN and SVI instantiated through VDP. In this case, the 

two leaf switches need to allocate the same first free available VLAN from a local pool as described previously. 

Figure 60 shows an example with two single-homed end-hosts. Each end-host is connected to one of the two leaf 

switches and the auto-configured profile instances are synchronized to the neighbor leaf switch. The example 

shows the relevant flags (L and V) along with the synchronized end-host (physical or virtual) MAC address and 

ARP entries. 

Note:   When the trigger for an end-host (physical or virtual) or a set of end-hosts appears on each of the two 
vPC+ leaf switches, the flag is set to LV. 

Figure 60.    Verification of the Instantiated Autoconfiguration Profile with vPC+ on Leaf Switch LEAF11 

! 

LEAF# show fabric database host 

Active Host Entries 

flags: L - Locally inserted, V - vPC+ inserted, R - Recovered 

VLAN  VNI         STATE          FLAGS PROFILE(INSTANCE) 

77        30000    Profile Active  L     
defaultNetworkIpv4EfProfile(instance_def_77_1) 

! 

! 

LEAF# show mac address-table dynamic 

Legend: 

        * - primary entry, G - Gateway MAC, (R) - Routed MAC, O - Overlay MAC 

        age - seconds since last seen,+ - primary entry using vPC Peer-Link 

   VLAN     MAC Address      Type      age     Secure NTFY   Ports/SWID.SSID.LID 

---------+-----------------+--------+---------+------+----+------------------ 

* 77       0050.56b7.545f    dynamic   260        F    F  Eth101/1/1 

+ 77       0050.56b7.5c83    dynamic   0          F    F  12.0.0 

! 

! 

LEAF# show ip arp vrf ORG:RED