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at | a time | until |
| the | Telnet | session | gives | a | normal | response | time. The last port that | ||||||||||||
you | disabled | should | be | the | one | through | which the congesting calls were coming. |
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2. If | you | can | be | in | front | on | the | ONcore | hub/CELLplex | 4000, | log on to the console, |
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make | sure that the trace is not active, | then if | the | ATM | switch | is | an ONcore, | look | |||||||||||||||
the | traffic | LEDs | and | disable the | for which | the | traffic LED | is | constantly | lit. | If | ||||||||||||
ATM | switch | is | a | CELLplex 4000, |
| disable the | port. |
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When there is congestion, it is often due | to | the | failure | of a major ATM component | (AR | ||||||||||||||||||
server, | LAN emulation server, switch down, public | network | down, | file | server | down). | You |
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have | to | determine | which | of | these | ATM | components | failed. |
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Problems of ATM connections/performance through a WAN (VP tunnel).
Steps to Take:
1. Check the Switch configurations at both sides:
check that the VPI corresponds to the VPI provided by your network provider.
check that the bandwidth is lower or equal to the Maximum Peak Rate negotiated with your network provider.
The | actual | bandwidth used | by | your | media | modules | is the maximum one (155 Mbps | ||||||||||||
for | a | 6402M | module, | 100 | Mbps | for | a | module | etc.), even | if a | lower | value | |||||||
is specified with the SET_LOGICAL_LINK command. |
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| check | that | one | NNI | port | on | one | side | is | defined as | and | that the | |||||||
NNI | port | on | the other side is defined | as |
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| if | you | are | using single mode 6402M modules, you | probably have to define the | ||||||||||||||
clocking as external, using the SET PORT command | (the clock is | usually |
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provided | by | the WAN). In addition, if | you have a CELLplex 4000 or an ONcore | ||||||||||||||||
hub | with | a | microcode | version | greater | than 2.0, | you have to specify the type o | ||||||||||||
network | (SONET | or | SDH) | at | the | end | of | the | SET | PORT | command. |
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2.If the previous steps did not help, then you require an ATM Analyzer for the following tests:
Hardware wrap | test | through the WAN up | to the media | module, install | the ATM | ||||
Analyzer | at one | side | of | the | WAN, | and the ONcore hub/CELLplex 4000 at | the | ||
other. | Disable | your | NNI | port, | and | enter | the command | WRAP slot.port |
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