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Enableing Access
Gateway (NPIV) on Brocade
Brocade's flavor of NPIV is called
Access Gateway. It's a way to dumb down the switch
and make it more of a
pass-through
device. When AG is enabled, the switch makes much
less routing or switching decisions, and passes
all the traffic to an upstream switch.
The upstream switch ports switch to F ports, and
the
NPIV switch become N ports.
Trunking doesn't really work, in AG
mode. The switch will load balance between
uplinks, and fail traffic to another
link in the event of a link failure,
but port bandwidth aggregation isn't done.
You can't cascade a switch off of a
switch that has AG enabled, so it's only good for
edge switches.
I don't think it works
with hard zoning, but I'm not going to test it.
The whole switch becomes part of the AD
of the upstream switch port.
The
upshot
for
us
is
that
the
switch
doesn't
care
about
fabric
changes.
It
doesn't
recalculate
all
of
the
available
routes ever time
there is a fabric rebuild, which should reduce the
interruption to the fabric every time there's a
rebuild.
We
had
problems
with
errors
on
ISLs
causing
a
fabric
rebuild,
and
with
so
many
edge
switches
it
was
causing issues for the hosts.
To enable AG
, first switch
to the AD that the upstream port, and this switch,
is a member of. In my case it was AD1.
And,
your
upstream
port
has
to
have
AG
enabled
(per port
on
the
upstream
switch),
my
48Ks
all
came
with
it
enabled on every port.
Check the AG mode:
sanswa:AD1:root> ag --modeshow
Access Gateway mode is NOT enabled
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Enable AG mode:
he10enc1sanswa:AD1:root> switchdisable
he10enc1sanswa:AD1:root> ag
--modeenable
WARNING:
Access
Gateway
mode
changes
the
standard
behavior
of
the
switch.
Please
check
Access
Gateway
Administrator's Guide before
proceeding.
Enabling agmode will remove
all the configuration data on the switch
including zoning configuration and
security database. Please backup your
configuration using configupload.
This operation will reboot the switch.
Do you want to continue? (yes, y, no,
n): [no] yes
Access Gateway mode was
enabled successfully
Switch is being
rebooted...
The switch does a fastboot,
which will take several minutes.
After
the switch is up, the upstream port looks like:
In switchshow:
...
29 2 13 011d00 id N4
Online F-Port 3 NPIV public
...
And portshow:
SanSW2:AD1:admin> portshow 2/13
portName:
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portHealth: HEALTHY
Authentication: None
portDisableReason: None
portCFlags: 0x1
portFlags:
0x24b03 PRESENT ACTIVE F_PORT G_PORT U_PORT
NPIV LOGICAL_ONLINE LOGIN NOELP LED
ACCEPT FLOGI
portType: 10.0
portState: 1 Online
portPhys: 6 In_Sync
portScn: 32 F_Port
port
generation number: 92
portId:
011d00
portIfId: 43220012
portWwn: 20:1d:00:05:1e:36:3f:8a
portWwn of device(s) connected:
21:01:00:1b:32:a9:78:e4
21:01:00:1b:32:b0:9a:42
20:00:00:05:1e:88:71:c2
Distance: normal
portSpeed:
N4Gbps
Notice the WWNs listed. One is
the N port on the switch. The other two are hosts
connected to that switch.
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HP
8/24
SAN
交换机既可用作独立的核心交换机,也可在大型核心到边缘分层存储网络中用作低成本的边
缘交换机,因此既能满足中小企业的需求,也能满足大型企业的需求。
8/24
SAN
交换机还可提供出色的
投资保护。
自适应端口支持向后兼容
1Gb
、
2
Gb
、
4
Gb
、
8 Gb/
秒的设备,极大降低
了部署复杂性和成本,
同时还兼容已安装的设备。
不需要
8
Gbit/
秒接口的企业可为新交换机配备
4 Gbit/
秒
< br>SFP
,同时保留未来
轻松升级至
8
Gbit/
秒
SFP
的能力。
配有
24
个已启用端口的
8/24
SAN
交换机可作为全光纤交换机部
署,或以访问网关模式进行部署,后者可提供到任意
SAN
的连接(默认模式设置为交换机)
。
访问网关
模式采用
NPIV
交换机标准,将光纤通道连接作为逻辑设备提交给
SAN
光纤。
特性
卓越性能
?
包括所有端口的同步线速支持,以提供高性能系统和高达
384Gb/
秒的全双工总带宽
?
提供更高性能可用性,以及完整的向后与向前投资保护
?
简化
SAN
管理,
无需将应用程序性能需
求与端口速度匹配
高可扩展能力
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?
提供连
接至多厂商光纤环境的无缝服务器连接,
允许多个服务器连接至一个
SAN
光纤设备,
无需增加交
换机域数。
?
允许将两台交换机间的
8
个端口
(
2
、
4
或
8
Gb/
秒)
组成一个单独的逻辑
p>
ISL
,
速度高达
64
Gb/
秒
(
128
< br>Gb/
秒全双工)
,以优化带宽利用率并实现负载均衡<
/p>
降低的总体拥有成本
?
通过自动路由数据至结构设备内的
所有可用路径,优化结构范围内的性能和负载平衡
?
消除
/<
/p>
避免高密度虚拟化服务器环境的性能瓶颈
?
用于优化
SAN
性能和资源利用率的高级结构服
务
HBA
虚
拟
化
以
p>
NPIV
打通
SAN
虚
拟
化最后一
关
为了让虚拟环境下的服务器与
SAN
环境连接更加弹性和安全,
同时简化
SAN
网络的架构,
NPIV(N_Port ID
p>
Virtualization)
协议因此诞生,相关产品包括光纤
信道
HBA
卡等也在今年陆续到位。
N
p>
端口为主机端连接至光纤交换器的连接端口,
NPIV
即为光纤信道中的一个协议,目的在于让一个
实体的
N
端口可以虚拟出数个
N_Port
ID
。
NPIV
协议是由国际信息技术
标准委员会
(INCITS)
所制定,其功
能是由光纤信道
HBA
卡提供,但前端的虚拟平台以及后端
的光纤信道交换器也要
能支持。
NPIV
之所以被制定,
一开始是为了虚拟环境所设计,
让不同的虚拟机
器可以对应至不同的
N_Port ID
,
以区隔不同虚拟机器与
SAN
环境的连接,因而提高安全性
。
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