Table Of Contents

Before You Begin

About Flash Devices

Internal bootflash:

External CompactFlash (Slot0)

Switch Roles

Using Valid Formats and Ranges

Before You Begin

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This chapter lists the information you need to have before you begin using your MDS 9000 Switch. For information on setting up the switch and doing an initial configuration, refer to the Cisco MDS 9000 Family Configuration Guide.

This chapter contains the following topics:

•About Flash Devices

•Switch Roles

•Using Valid Formats and Ranges

About Flash Devices

Every switch in the Cisco MDS 9000 Family contains one internal bootflash. The Cisco MDS 9500 Series additionally contains one external CompactFlash called slot0. (See Figure 4-1 and Figure 4-2.)

Figure 4-1 Flash Devices in the Cisco MDS 9000 Supervisor Module

Figure 4-2 External CompactFlash in the Cisco MDS 9000 Supervisor Module

Internal bootflash:

All switches in the Cisco MDS 9000 Family have one internal bootflash: that resides in the supervisor or switching module.You have access to two directories within the internal bootflash: file system.

•The volatile: directory which provides temporary storage, and is also the default. Files in temporary storage (volatile:) are erased when the switch reboots.

•The bootflash (nonvolatile storage): directory which provides permanent storage. The files in bootflash are preserved through reboots and power outages.

External CompactFlash (Slot0)

Cisco MDS 9500 Series directors contain an additional external CompactFlash called slot0:

The external CompactFlash, an optional device for MDS 9500 Series directors, can be used for storing software images, logs, and core dumps.

Switch Roles

By default, two roles exist in all switches:

•Network operator—Has permission to view the configuration.

•Network administrator—Has permission to execute all commands and to set up to 64 permission levels based on user roles and groups.

When you execute a command, perform command completion, or obtain context sensitive help, the switch software allows the operation to progress if you have the correct permission as specified in the description of the command.

Using Valid Formats and Ranges

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Note Do not enter ellipsis ( ... ), vertical bars ( | ), less than or greater than ( < > ), brackets ( [  ] ), or braces ( {  } ) in any formats or ranges. These characters have special meaning in SAN-OS text strings.

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Table 4-1 Valid Formats and Ranges 

Address	Description	Valid Format Example	Range
MAC address	6 bytes in hexadecimal format separated by colons (not case-sensitive)	00:00:0c:24:d2:Fe	--
IP address	32 bytes, written as 4 octets separated by periods (dotted decimal format) that are made up of a network section, an optional netmask section, and a host section.	126.2.54.1	--
VSAN	Integer that specifies the VSAN.	7	1 to 4093
VLAN	Integer that specifies the VLAN	11	1 to 4093
Port WWN (p WWN)	Eight hexadecimal numbers separated by colons (not case-sensitive).	12:34:56:78:9A:BC:dE:F1	--
Node WWN (n WWN)	Eight hexadecimal numbers separated by colons (not case-sensitive).	12:34:56:78:9A:BC:dE:F1	--
LUN	8 bytes in hexadecimal format separated by colons. A minimum of two hex characters are acceptable. The valid format is hhhh[:hhhh[:hhhh[:hhhh]]]	64 (100d = 64h)	--
F C ID	Six character hexadecimal value prepended by 0x.	0xabc123	--
Domain ID	Integer that specifies the domain.	7	1 to 239
Timers	Integer that specifies timers in milliseconds for latency, FC time out values (TOV).	100	0 to 2147483647
Switching module	Slot in which the applicable switching module resides.	1	1 to 15
Switch priority	Integer specifying switch priority.	5	1 to 254
Channel group	Integer that specifies a PortChannel group addition.	1	1 to 100
Fabric Shortest Path First (FSPF)	Integer that specifies the hold time (in milliseconds) before making FSPF computations.	1000	0 to 65535
Fabric Analyzer	The allowed range for the frame size limit in bytes.	64	64 to 65536
Fabric Analyzer captures	An example of 10 frames, limits the number of frames captured to 10.	10	0 to 2147483647
FCIP profile	Integer that specifies the FCIP profile	101	1 to 255
TCP retransmit time	Integer that specifies the minimum retransmit time for the TCP connection in milliseconds	300	250 to 5000
Keepalive timeout	Integer that specifies the TCP connection's keepalive timeout in seconds.	60	1 to 7200
TCP retransmissions	Integer that specifies the maximum number of TCP transmissions.	6	1 to 8
PMTU	Integer that specifies the path MTU reset time in seconds	90	60 to 3600
TCP buffer size	Integer that specifies the advertised TCP buffer size in KB.	5000	0 to 8192
Traffic burst size	Integer that specifies the maximum burst size in KB.	30	10 to 100
Peer TCP port	Integer that specifies the TCP port number	3000	0 to 65535
Acceptable time difference	Integer that specifies the acceptable time difference in milliseconds for a packet being accepted.	4000	1 to 60,000
iSCSI pWWN allocation	Integer that specifies the number of pWWNs that must be allocated to an iSCSI initiator.	2	1 to 64
CDP refresh and hold time	Integer that specifies the refresh time interval and the hold time in seconds for the CDP protocol.	60	5 to 255