一、问题现象

市面上的交换机大部分都是OEM的博科的，现网一台光交在同事在使用admin帐号登录两次，未执行logout退出时，出现了“Sorry! Max remote sessions for login:admin is 2 ” 的报错，具体如下：

max-remote-session
max-remote-session

二、解决方法

在brocade的官方论坛上 ，有人给出了解决方法。具体就是换用root用户进行登录，进入后通过telnetkill命令将admin 的session强制杀掉就行了。操作如下：

 1swd77:FID128:root>
 2swd77:FID128:root> who
 3admin    pts/0    Aug 10 16:04
 4admin    pts/1    Aug 10 16:53
 5root     pts/2    Aug 10 17:41
 6swd77:FID128:root> i |grep pts
 74 S     0  7807  7803  0  76   0 -  1422 -      pts/0    00:00:00 rbash
 80 S     0  8040  7807  0  76   0 -   530 -      pts/0    00:00:00 more
 94 S     0  8544  8541  0  76   0 -  1422 -      pts/1    00:00:00 rbash
100 S     0  8959  8544  0  75   0 -   530 -      pts/1    00:00:00 more
114 S     0  9839  9836  0  75   0 -   735 -      pts/2    00:00:00 sh
124 R     0  9928  9839  0  79   0 -  3532 -      pts/2    00:00:00 i
130 S     0  9929  9839  0  75   0 -   437 -      pts/2    00:00:00 grep
140 R     0  9932  9928  0  79   0 -   557 -      pts/2    00:00:00 ps
15swd77:FID128:root> killtelnet
16Collecting login information....
17                   List of sessions (3 found)
18______________________________________________________________________________
19 Session No   USER     TTY      IDLE     LOGIN@ FROM
20~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
21     0        admin    pts/0    1:37m    16:04  10.211.59.91
22     1        admin    pts/1    35:24    16:53  10.211.59.91
23     2        root     pts/2    0.00s    17:41  10.212.52.253
24~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25Enter Session Number to terminate (q to quit) 0
26______________________________________________________________________________
27 USER     TTY      IDLE     LOGIN@ FROM
28~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
29 admin    pts/0    1:37m    16:04  10.211.59.91
30~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
31Confirm Kill Session (Y/[N]): y
32Killing Session....  Done!
33Collecting login information....
34                   List of sessions (2 found)
35______________________________________________________________________________
36 Session No   USER     TTY      IDLE     LOGIN@ FROM
37~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
38     0        admin    pts/1    35:33    16:53  10.211.59.91
39     1        root     pts/2    0.00s    17:41  10.212.52.253
40~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
41Enter Session Number to terminate (q to quit) 0
42______________________________________________________________________________
43 USER     TTY      IDLE     LOGIN@ FROM
44~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
45 admin    pts/1    35:33    16:53  10.211.59.91
46~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
47Confirm Kill Session (Y/[N]): y
48Killing Session....  Done!
49Collecting login information....
50                   List of sessions (1 found)
51______________________________________________________________________________
52 Session No   USER     TTY      IDLE     LOGIN@ FROM
53~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
54     0        root     pts/2    0.00s    17:41  10.212.52.253
55~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
56Enter Session Number to terminate (q to quit) q
57swd77:FID128:root>

三、其他

出于安全考虑，以上这个现象是在正常的，root用户没有这个限制。Brocade文档对每个用户限制如下：

 1Maximum number of simultaneous sessions
 2Role name Maximum sessions
 3Admin 2
 4BasicSwitchAdmin 4
 5FabricAdmin 4
 6Operator 4
 7SecurityAdmin 4
 8SwitchAdmin 4
 9User 4
10ZoneAdmin 4