The Catalyst 4000 with Supervisor Engine I chassis serial number on the Catalyst 4003, 2948G, and 2980G is not readable through a CLI command. The serial number that appears in the show version command output in the example in this section is the serial number of the Supervisor Engine. The actual serial number appears on a sticker on the outside of the chassis.
On the Catalyst 4500/4000 Supervisor 2, the chassis serial number is available via CLI in versions 5.5(10), 6.3(2), and later versions. In earlier versions, theshow versioncommand shows the Supervisor Engine serial number in the place of the chassis serial number. To obtain the serial number of the chassis in these earlier versions, check the external sticker on the chassis.
Use theshow versioncommand to determine the chassis serial number and switch model type, as the example here shows. You find all switch stack members, chassis, and serial number information in the output:
SA numberThe SA number represents the stocking ID. The SA number is not required to obtain warranty information. However, the SA number is required to process an RMA request. Provide this information during the RMA process.
The Social Security number (SSN) was created in 1936 for the sole purpose of tracking the earnings histories of U.S. workers, for use in determining Social Security benefit entitlement and computing benefit levels. Since then, use of the SSN has expanded substantially. Today the SSN may be the most commonly used numbering system in the United States. As of December 2008, the Social Security Administration (SSA) had issued over 450 million original SSNs, and nearly every legal resident of the United States had one. The SSN's very universality has led to its adoption throughout government and the private sector as a chief means of identifying and gathering information about an individual.
On December 17, 1935, the Board approved the 9-digit option (McKinley and Frase 1970, 323). The Board planned to use the year one attained age 65 as part of the SSN, thinking that once an individual attained age 65, the SSN would be reassigned to someone else. But at a meeting on January 23, 1936, the unemployment compensation delegates objected to the use of digits to signify age because they thought a number of workers would falsify their age. As a result, a new scheme adopted by the Board on February 14 consisted of a 3-digit area code, a 2-digit month of birth, and a 4-digit serial number.
The 3-digit area number is assigned by geographic region. In 1936 the Social Security Board planned eventually to use area numbers to redistribute work to its 12 regional centers to serve workers in those areas. One or more area numbers were allocated to each state based on the anticipated number of SSN issuances in the state.3 Prior to 1972, the numbers were issued to local offices for assignment to individuals; it was thought this would capture information about the worker's residence. So, until 1972, the area number represented the state in which the card was issued. (Barron and Bamberger 1982, 29).
Generally, area numbers were assigned in ascending order beginning in the northeast and then moving westward. For the most part, people on the east coast have the lowest area numbers and those on the west coast have the highest area numbers. However, area numbers did not always reflect the worker's residence. During the initial registration in 1936 and 1937, businesses with branches throughout the country had employees return their SS-5 Application for Account Number to their national headquarters, so these SSNs carried the area number where the headquarters were located. As a result, the area numbers assigned to big cities, such as New York, Philadelphia, Boston, and Chicago, were used for workers in many other parts of the country (McKinley and Frase 1970, 373). Also, a worker could apply in person for a card in any Social Security office, and the area number would reflect that office's location, regardless of the worker's residence.
Since 1972, when SSA began assigning SSNs and issuing cards centrally from Baltimore, MD, the area number has been assigned based on the ZIP code of the mailing address provided on the application for the original Social Security card. The applicant's mailing address may not be the same as the place of residence.
SSA has many years' worth of potential SSNs available for future assignment. However, because of population shifts, SSA now faces an imbalance in the geographic allocation of area numbers. Some states have a current allocation of SSNs that will last for many years, while others have a pending shortage. As a result, given present rates of assignment and existing geographic allocations, several states currently have fewer than 10 years' worth of SSNs available for assignment.
In a July 3, 2007, Federal Register notice, SSA solicited public comment on a proposal to change the way SSNs are assigned (SSA 2007b). Under this proposal, SSA would randomly assign SSNs from the remaining pool of available numbers, and the first three digits would no longer have any geographic significance. SSA contends that doing so would ensure a reliable supply of SSNs for years to come, and would also reduce opportunities for identity theft and SSN fraud and misuse. SSA plans additional discussion with other government entities and the private sector before implementing any change.
The group number (the fourth and fifth digits of the SSN) was initially determined by the procedure of issuing numbers in groups of 10,000 to post offices for assignment on behalf of the Social Security Board's Bureau of Old-Age Benefits. The group numbers range from 01 to 99 (00 is not used), but for administrative reasons, they are not assigned consecutively. Within each area number allocated to a state, the sequence of group number assignments begins with the odd-numbered group numbers from 01 to 09, followed by even group numbers 10 through 98, then even numbers 02 through 08, and finally odd numbers 11 through 99.4
Even at the inception of the program, the Social Security Board understood that individuals would need to have a "token" that would provide a record of the number that had been assigned to them. This token would help employers accurately report an individual's earnings under the program.
Although issuing SSNs is still a large workload for SSA, one rarely thinks about the major undertaking it was to register workers for the first SSNs. Initial estimates were that 22 million SSNs would be issued immediately, with 50 million ultimately to be issued (McKinley and Frase 1970, 15). In fact, 35 million SSNs were issued in the first 8 months of the registration effort. The Social Security Board estimated it would also need to assign identifying numbers to 3.5 million employers during this same time (McKinley and Frase 1970, 309).
However, difficulties in recruiting personnel and setting up offices would make it impossible for the Bureau to handle the workload. As of September 30, 1936, Bureau of Old-Age Benefits employees numbered only 164 (Corson 1938, 6). Fortunately, the Board was able to enlist the Post Office Department to issue SSNs, signing an agreement on September 25, 1936. The Post Office Department had 45,000 facilities and over 350,000 employees at that time (Wyatt and Wandel 1937, 52).
Beginning November 16, 1936, the post offices sent Form SS-4s to employers based on the lists they had compiled earlier that month. Along with information about the business establishment, employers were asked for the number of workers they employed. The mail carriers collected the completed SS-4s a week or two later. Based on SS-4 information, the post offices delivered Form SS-5s to the employers the following week for distribution to employees (McKinley and Frase 1970, 368).
Effective July 1937, Bureau field offices, still numbering only 175 with 1,702 total employees, took over the enumeration workload from the post offices (Zwintscher 1952, 90; SSA 1965, 25). By that time, some 35 million SSNs had been issued at a cost of $5.7 million (SSA 1990, 1; McKinley and Frase 1970, 372).
For over 20 years, Bureau field offices assigned SSNs, using blocks of prenumbered Social Security cards furnished to each office. Office staff simply typed the number holder's name on one of the prenumbered cards. For replacement cards, field office staff manually typed the SSN and name on a blank card. In 1961, issuance of original SSNs was centralized in Baltimore, but local offices continued to issue replacement cards. In March 1972, SSA began assigning SSNs and issuing cards exclusively from Baltimore via a computer-based system.8 It was also in 1972 that all applicants for federal benefits were required to have their own SSN.
The Baltimore Records Office used a nine-step process to create a permanent master record and to establish an earnings record for each individual.10 One hundred applications and office record cards, numbered consecutively, were sent through each operation together with a control unit of nine cards (one for each step). The appropriate control card was removed at the end of a step and sent to a control file to track the status of each block (McKinley and Frase 1970, 375).
Until recently SSA also maintained a separate SSN master file indexed by cardholder name. The Alpha Index File or Alphident enabled SSA employees to search by name if the number was unknown. In the process of modernizing SSA's master files, this file was converted to an IBM DB2 relational database linked to the Numident file. This database provides the same basic functionality as the Alphident. Like the Flexoline, the DB2 uses the Russell Soundex Coding System to group all surnames that have the same basic consonant sounds. When an individual's identifying information is available, an SSA employee can attempt to locate the SSN using a key based on the Soundex version of the last name, plus the first 4 characters of the first name, plus the century, year, and month of birth. SSA has designated this database a sensitive file and access is restricted. 2b1af7f3a8