Cisco 11.0 BT Manual de usuario descargar pdf (Pagina 9)

TN3270 Server Implementation 2-9

• Two 3270 data-stream mode types: <> or E

An E mode type indicates that the client supports the host sending a read-partition query to the client to

determine the client’s capabilities.

The combinations of the machine, model, and extension types result in 32 model entries plus the default entry.

However, youcan specify an SSCPFM of USSSCS for all clients regardless of type. This reduces the entries to 16.

Thenif youuse thewildcard torepresent boththe 3278and 3279machine types,the numberof entriesis reduced

to eight (plus the default).

The switched major node deﬁnition must specify the LUGROUP name of the LUGROUP parameter deﬁned in

the major node.The LU names of these dynamic LUs aregenerated by the LUSEED parameter. Alternatively, you

can code the VTAM-exit ISTEXCSD and use an in-house algorithm for assigning LU names.

For an example of an LUGROUP and a explanation of the contents, see the “PU and LU Deﬁnitions” section in

the Migration Scenarios chapter.

LUSEED Parameter

LUSEED is a parameter used to reduce the conﬁguration required for the deﬁnitions of LUs. The LUSEED

parameter is required for dynamic LUs and can be used for static LUs.

The LUSEED parameter can be speciﬁed on both the channel-attached router and in VTAM. When conﬁguring

PUs in the channel-attached router, the parameter is LU-SEED. In VTAM, the parameter is LUSEED. The

LU-SEED parameter is not valid on the channel-attached router if DLUR is used.

The LUSEED is a preﬁx that is used in the creation of LU names. The resulting LU name depends on the method

used to specify the LU-SEED:

• If the parameter LU-SEED is speciﬁed with two ‘#’ characters, then the hexadecimal representation of the

LOCADDR is added to the sufﬁx of the LU name. For example, if the parameter “LU-SEED LU1##” is

speciﬁed with the LOCADDR of 10 decimal, the LU will be named LU10A.

• If the parameter LU-SEED is speciﬁed with three‘#’ characters, then the decimal equivalent of the LOCADDR

is added to the sufﬁx of the LU name. For example, if the parameter “LU-SEED LU1###” is speciﬁed with the

LOCADDR of 10 decimal, the LU will be named LU1010.

The TN3270 Server LU-SEED parameter defaults to the ﬁrst six characters of the PU name concatenated with

the two hexadecimal character LOCADDR number. For example, if the PU is named PUXCPA01 and no

LU-SEED is coded on the CIP or CPA, then the LU with LOCADDR 10 decimal will be named PUXCPA0A.

Be sure to deﬁne each dynamic PU with a unique LU-SEED parameter in the VTAM switched deﬁnition.

Otherwise, VTAM will attempt to deﬁne two LUs with the same name and the second request will fail. The

TN3270 client will show connected,but the CIP/CPA will bewaiting for theACTLU toﬂow andthe session will

never ﬂow.

We recommend that you make the LU-SEED on CIP/CPA and the LUSEED on VTAM identical for the same PU

to ensure that dynamic LUs have the same name on both the channel-attached router and VTAM.

Note that even if the LU-SEED is coded the same on both VTAM and the CIP/CPA, static LU names may not

match because they are hardcoded in VTAM. Unless VTAM passes the LU name to the CIP/CPA or the VTAM

static LU names match the CIP LU-SEED naming convention the LU names in each will be different. The best

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Cisco 11.0 BT Manual de usuario Pagina 9