Download NBase-Xyplex GFS3012

Commands and Descriptions
LEN:
The length of time between retransmissions. You can configure the retransmit value
on a per interface basis. If this is set too low for an interface, needless retransmissions
will ensue. If the value is set too high, the speed of the flooding, in the face of lost
packets, may be affected.
SEQ:
The LS sequence number. It is used to detect old and duplicate link state advertisements. The space of sequence numbers is linearly ordered. The larger the sequence
number, the more recent the advertisement.
CHK:
The LS checksum field. This field is the checksum of the complete contents of the
advertisement, excepting the LS age field. The LS age field is excepted so that an
advertisement’s age can be incremented without updating the checksum. The link
state advertisement header also contains the length of the advertisement in bytes;
subtracting the size of the LS age field (two bytes) yields the amount of data to
checksum.
The checksum is used to detect data corruption of an advertisement. This
corruption can occur while an advertisement is being flooded, or while it is being
held in a router’s memory. The LS checksum field cannot contain a zero; which is
considered a checksum failure. In other words, calculation of the checksum is not
optional.
Bits:
The type of external metric. This Bit setting enables paths to those types of routers
to be saved in the routing table, for later processing of summary link advertisements and AS external link advertisements.
Value - Meaning
B - Indicates an area border router. Bit B is set whenever the router is actively
attached to two or more areas, even if the router is not currently attached to the
OSPF backbone area.
E - AS Boundary Router. Bit E are not set in a router links advertisement for a stub
area (stub areas cannot contain AS boundary routers). If bit E is set, the metric
specified is a Type 2 external metric. This means the metric is considered larger
than any link state path. If bit E is zero, the specified metric is a Type 1 external
metric. This means that it is comparable directly (without translation) to the link
state metric.
V - Router Links.
MaskLen:
The net mask length.
nRouters:
The number of network routers.
Metric:
The Metric field (applicable only for Summary Link State Advertisements).
Where - Means
0 - 0000 normal service
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