ATM Release Notes

ATM Version I.11.11.30

Known Problems and Workarounds

Chapter 3 35

Although these error messages occur, you do not have to do anything: ATM and EMS will

operate correctly.

• While an ATM adapter is operational, if you disconnect the ATM cable from the switch

and reconnect it to another switch, the ELAN interfaces conﬁgured over the ATM adapter

might not start automatically.

Workaround: Run the atminit command to restart the adapter and all of its LANE

interfaces.

• When using a FORE switch, you might experience a delay (approximately two to three

minutes) in your ELAN interfaces coming up after you reboot the system.

Workaround: Ensure that you have either of these installed: (1) the FORE patch

asx-i960_6.0.1_1.48662E or (2) a release of FT later than FT 5.4.

• During system startup, an ELAN interface’s initialization might not complete before the

IP initialization stars. This can lead to errors if the IP conﬁguration uses that ELAN

interface. An example of this is when static routes use the ELAN interface.

Workaround: To avoid this, a tunable delay parameter (ATM_ELAN_TIMEOUT) has been

added to the ATM subsystem ﬁle (/etc/rc.config.d/atmconf). This parameter speciﬁes

how long the ATM startup script waits for the ELAN interface initializations to complete.

Note that the default value for the ATM_ELAN_TIMEOUT parameter is 0 (zero), which means

“no delay.”

• You might have to specify the LAN type during ELAN interface conﬁguration, if you are

in either of these situations:

— You have an ELAN connectivity problem, and your ATM switch’s manufacturer

diagnoses the problem as being caused by the absence of the LAN type during

conﬁguration.

— Your ATM switch provides the capability of specifying the LAN type during

conﬁguration, and you have conﬁgured the LAN Emulation services to require the

LAN type during conﬁguration.

Workaround: The only way you can do this is to manually specify the LAN type (the

parameter is called lan_type) in the ELAN interface’s conﬁguration ﬁle; you cannot do

this within SAM. Set the parameter HP_ATM_ELAN_TYPE as follows:

HP_ATM_ELAN_TYPE = 802.3

for Ethernet

HP_ATM_ELAN_TYPE = 802.5

for Token Ring

However, keep in mind that each time you use SAM to modify the interface’s

conﬁguration, SAM overwrites the ELAN interface conﬁguration ﬁle. So, for example,

you’ve manually speciﬁed the LAN type in an ELAN interface’s conﬁguration ﬁle. Then,

you later use SAM to modify some other part of the interface’s conﬁguration. When you