A wireless client roams from one Access Point to another Access Point using a different switch in a Cisco SD-Access network. If only a single Wireless Lan Controller in involved, what roaming methods

Question

Options

• AL3 roaming
• Binter-xTR
• Cauto anchor
• Dbridged roaming

• A
  6% (4)
• B
  81% (50)
• C
  11% (7)
• D
  2% (1)

Explanation

Cisco SD-Access Wireless Roaming Explanation

Why B is correct: In Cisco SD-Access, when a wireless client roams between Access Points connected to different switches (different xTRs - Extended Tunnel Routers) with only a single WLC, this is called inter-xTR roaming. The xTRs are the SD-Access fabric edge nodes (switches), and the LISP protocol handles the mobility by updating the client's location mapping between these fabric nodes, even though the WLC remains the same.

Why the others are wrong:

• A (L3 roaming) is a traditional wireless concept from pre-SD-Access architecture, not the correct SD-Access terminology for this scenario
• C (Auto anchor) refers to a WLC configuration where guest traffic is tunneled to a designated "anchor" WLC - it requires multiple WLCs, not one
• D (Bridged roaming) is not a standard Cisco SD-Access roaming classification; this is a distractor term

Memory Tip: Think of xTR = fabric edge switch. If the client crosses from one switch to another (inter = between), it's inter-xTR roaming. The key clues in the question are different switch + single WLC - one WLC rules out auto anchor, and "different switch" points to inter-xTR!

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