You added a new Brocade VDX 6740 to an existing Brocade VCS Fabric in your data center.
You connected the VDX 6740 to ports 3/0/11 and 3/0/12 on the existing fabric. After the
switch boots, you realize it does not join the fabric. You examine the ISL status on the fabric
as shown in the exhibit.
sw0(conf-if-te-3/0/19)# do sh fabric islport
Name: sw0
Type: 95.2
State: Online
Role: Fabric Principal
VCS Id: 1
Config Mode:Distributed
Rbridge-id: 3
WWN: 10:00:00:05:33:46:71:61
FCF MAC: 00:05:33:46:71:61
Index Interface State Operational State

===================================================================
0 Te 3/0/1 Down
1 Te 3/0/2 Down
2 Te 3/0/3 Down
3 Te 3/0/4 Down
4 Te 3/0/5 Down
5 Te 3/0/6 Down
6 Te 3/0/7 Down
7 Te 3/0/8 Up ISL 10:00:00:05:33:5c:e1:5a “sw0” (downstream)(Trunk Primary)
8 Te 3/0/9 Up ISL (Trunk port, Primary is 3/0/8 )
9 Te 3/0/10 Down
10 Te 3/0/11 Up ISL (Trunk port, Primary is 3/0/12 )
11 Te 3/0/12 Up ISL segmented,(ESC mismatch, Config Mode)(Trunk Primary)
12 Te 3/0/13 Down
13 Te 3/0/14 Down
14 Te 3/0/15 Down
15 Te 3/0/16 Down
16 Te 3/0/17 Down
17 Te 3/0/18 Down
18 Te 3/0/19 Down
19 Te 3/0/20 Down
20 Te 3/0/21 Down
21 Te 3/0/22 Down
22 Te 3/0/23 Down
23 Te 3/0/24 Down
What is causing the problem?

A.
The new switch VCSID is incorrect.

B.
The new switch has an overlapping RBridge ID.

C.
The new switch does not have a VCS Fabric license.

D.
The new switch is not configured for logical chassis.