AOS-CX VSF and VSX Flashcards
7 cards from real ACSP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 AOS-CX VSF and VSX flashcards as text
When a downstream access switch connects to a VSX pair via MCLAG, which spanning tree port state does the MCLAG port-channel typically operate in?
Answer: Forwarding on both peers simultaneously
MCLAG presents a single logical LAG to STP so both peers' physical links remain in Forwarding state simultaneously, eliminating blocked uplinks.
What is a key operational difference between VSF and VSX when one member/peer loses power?
Answer: VSF reconverges as remaining members take over; VSX Secondary shuts MCLAG ports in split-brain only when ISL also fails
In VSF a member loss triggers stack reconvergence but traffic continues; in VSX, losing a peer only causes MCLAG shutdown if both ISL and keepalive are also gone.
In AOS-CX VSX, which protocol is used by the keepalive link to verify peer liveness?
Answer: UDP-based VSX heartbeat messages
VSX uses proprietary UDP-based heartbeat messages over the keepalive link to determine whether the peer is alive, independent of the ISL.
Which AOS-CX VSF command allows an administrator to manually trigger a failover and promote the Standby to Conductor?
Answer: vsf failover
The 'vsf failover' command initiates a graceful failover, promoting the Standby member to Conductor and demoting the current Conductor.
When configuring VSX on AOS-CX switches, on which interface type is the 'vsx peer-link' designation applied?
Answer: Port-channel (LAG) interface
The VSX ISL must be a port-channel (LAG) interface to provide the bandwidth and redundancy required; 'vsx peer-link' is configured on the port-channel.
What is the purpose of the 'vsx-sync' configuration on an AOS-CX VSX switch?
Answer: It specifies which protocol state (e.g., VLANs, OSPF, ACLs) is synchronized across the ISL
The 'vsx-sync' stanza lists the specific protocol and configuration domains (VLANs, ACLs, OSPF, etc.) that should be synchronized between VSX peers over the ISL.
Which statement is TRUE about VSF member IDs in AOS-CX?
Answer: Member IDs are statically configured and persist across reboots
VSF member IDs are statically configured by the administrator and stored in the switch's local configuration, persisting across reboots to maintain stable port numbering.