Avaya Configuring BayStack Remote Access Manual de usuario descargar pdf (Pagina 108)

Configuring BayStack Remote Access

6-20 117341-A Rev. A

The Matrix conﬁguration requires 212 bytes. The Matrix data requires

approximately 178 bytes of memory for each source/destination pair the DCM

detects on a segment.

Filter and Packet Capture Groups

You must create Filter and Packet Capture conﬁgurations through your RMON

network management application. You can create as many Filter and Packet

Capture conﬁgurations as memory permits, up to the RMON limit of 65,535.

Memory requirements vary greatly based on the size and number of ﬁlters and the

size of the capture buffer. In most cases, you need 3 to 5 KB of memory for the

Filter and Packet Capture conﬁgurations.

The size of the capture buffer determines the amount of memory you need for the

data. You can request the largest buffer size available by specifying a buffer size of

-1 through your RMON network management application. When you specify

-1 for the capture buffer size, the RMON agent attempts to allocate a default

buffer depending on the DRAM in the DCM (T

able 6-5).

You can also request a larger buffer size of up to 15 MB. In any case, if there is not

enough memory available to satisfy the request, the RMON agent will provide a

buffer that uses all available memory.

You can determine the maximum number of packets that the RMON agent can

capture in a buffer as follows:

<buffer size> / (<packet slice size> + 20 bytes) = Maximum packets captured

Caution: The memory required for a Filter or a Packet Capture conﬁguration

and for storing captured packets can easily exhaust all available memory on a

DCM, particularly if the ﬁlters are not selective.

Table 6-5. Default Size for Capture Buffer

Installed DRAM (MB) Default Buffer Size (KB)

2 32

4 64

8 256

16 512

1 2 ... 103 104 105 106 107 108 109 110 111 112 113 ... 167 168

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Avaya Configuring BayStack Remote Access Manual de usuario Pagina 108