A working IP phone does not necessarily reveal how it learned its voice VLAN. This article explains how LLDP-MED, CDP, manual settings, and DHCP discovery affect switch migration, and what engineers should verify to preserve VLAN tagging, PC connectivity, authentication, and working voice services.
IP-телефоны
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Migrating from CBS250 to Catalyst 1200: Which CLI Commands and Web Macros Become Invalid?
Written by: David Lorame, Technical Director & Senior Network Architect (CCIE & HCIE) Expertise: Enterprise Networking, Cisco Routing & Switching, Data Center ArchitectureLast Updated: May 21, 2026
Cisco officially positions the Catalyst 1200 series as the direct successor to the widely deployed CBS...