Simple Network Management Protocol (SNMP) | 963
The table that the Dell Force10 system sends in response to the snmpget request is a table that contains
hexadecimal (hex) pairs, each pair representing a group of eight ports.
• On the E-Series, 12 hex pairs represents a line card. Twelve pairs accommodates the greatest currently
available line card port density, 96 ports.
• On the C-Series, 28 hex pairs represents a line card. Twenty-eight pairs accommodates the greatest
currently available line card port density, 28 ports per port-pipe, and any remaining hex pairs are
unused.
• On the S-Series, 7 hex pairs represents a stack unit. Seven pairs accommodates the greatest number of
ports available on an S-Series – 56 ports on the S55 and S60; 64 ports on the S4810. On the S55 and
S60, the last stack unit is assigned 8 pairs; the eighth pair is unused. On the S4810, the last stack unit
begins on the 66th bit.
The first hex pair, 00 in Figure 46-19, represents ports 1-7 in Stack Unit 0. The next pair to the right
represents ports 8-15. To resolve the hex pair into a representation of the individual ports, convert the hex
pair to binary. Consider the first hex pair 00, which resolves to 0000 0000 in binary:
• On the E-Series and C-Series each position in the 8-character string is for one port, starting with Port 0
at the left end of the string, and ending with Port 7 at the right end. A 0 indicates that the port is not a
member of the VLAN; a 1 indicates VLAN membership.
• On the S-Series, each position in the 8-character string is for one port, starting with Port 1 at the left
end of the string, and ending with Port 8 at the right end. A 0 indicates that the port is not a member of
the VLAN; a 1 indicates VLAN membership.
Figure 46-19 shows the output for an S-Series. All hex pairs are 00, indicating that no ports are assigned to
VLAN 10. In Figure 46-20, Port 0/2 is added to VLAN 10 as untagged. And the first hex pair changes
from 00 to 04.
Figure 46-20. Displaying Ports in a VLAN using SNMP
[FTOS system output]
R5(conf)#do show vlan id 10
Codes: * - Default VLAN, G - GVRP VLANs
Q: U - Untagged, T - Tagged
x - Dot1x untagged, X - Dot1x tagged
G - GVRP tagged, M - Vlan-stack
NUM Status Description Q Ports
10 Inactive U Gi 0/2
[Unix system output]
> snmpget -v2c -c mycommunity 10.11.131.185 .1.3.6.1.2.1.17.7.1.4.3.1.2.1107787786
SNMPv2-SMI::mib-2.17.7.1.4.3.1.2.1107787786 = Hex-STRING: 40 00 00 00 00 00 00 00 00 00 00
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