Cisco Catalyst 2960-XR Configuration Guide

Table 9: Prestandard and Standard Terminology
Cisco StandardCisco PrestandardIEEE Standard
CIST regional rootIST masterCIST regional root
CIST internal path costIST master path costCIST internal root path cost
Root path costRoot path costCIST external root path cost
Instance rootInstance rootMSTI regional root
Root path costRoot path costMSTI internal root path cost
Illustration of MST Regions
This figure displays three MST regions and a legacy IEEE 802.1D switch (D). The CIST regional root for
region 1 (A) is also the CIST root. The CIST regional root for region 2 (B) and the CIST regional root for
region 3 (C) are the roots for their respective subtrees within the CIST. The RSTP runs in all regions.
Figure 5: MST Regions, CIST Masters, and CST Root
Catalyst 2960-XR Switch Layer 2 Configuration Guide, Cisco IOS Release 15.0(2)EX1
48 OL-29424-01
Configuring Multiple Spanning-Tree Protocol
Illustration of MST Regions

Cisco Catalyst 2960-XR Specifications

General

Stacking Bandwidth	80 Gbps
Layer Support	Layer 2 and Layer 3
Jumbo Frame Support	9198 bytes
RAM	512 MB
Input Voltage	100-240V AC
Model	Catalyst 2960-XR
Uplink Interfaces	4 x 1G SFP or 2 x 10G SFP+
Downlink Interfaces	24 or 48 x Gigabit Ethernet ports
Power Supply	Internal
MAC Address Table Size	16, 000 entries
PoE	Available on PoE models
Weight	4.5 kg
Features	energy efficiency
Stacking	Up to 8 switches
Operating Temperature	0 to 45°C