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Cisco FabricPath uses what as a common bridge ID to connected Spanning Tree Protocol bridges?
A. C84C.75FA.6000
B. 0100.5E11.02FD
C. C84C.76FA.6000
D. 4000.0000.0001
Correct Answer: A
Explanation/Reference:
Explanation:
Layer 2 Gateway Spanning Tree Protocol (L2G-STP) builds a loop-free tree topology. However, it has some limitations. One limitation is that the STP root must always (virtually) be in the FabricPath cloud. For example, it is not possible to have two FabricPath networks connected through a CE cloud. A bridge ID for STP consists of a MAC address and bridge priority. When running in FabricPath mode, the system automatically assigns the edge devices with the MAC address c84c.75fa.6000 from a pool of reserved MAC addresses. As a result, each device has the same MAC address used for the Bridge ID.
Reference: http://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/mkt_ops_guides/513_n1_1/n5k_ops_fabricpath.html
