A city adds dual stitch gateways for redundancy and then sees Layer-2 loops for a stretched segment across the interconnect. What design care does this highlight?
Select an answer to reveal the explanation.
Short Explanation
Two bridges side by side without traffic rules will cheerfully loop your city buses forever. Redundant stitch gateways need designated-forwarder style thinking or routing discipline. Redundancy without loop care is just a faster loop.
Full Explanation
Multiple stitch gateways improve availability but can create duplicate forwarding paths for BUM or L2 overlays if not designed carefully. Loop-prevention, DF-like behavior for multi-homed segments, and sound routing/policy design are required. Assuming dual gateways auto-fix loops, blindly killing STP citywide, or advertising an Ethernet Segment with no multi-homing controls worsens the failure mode.