Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 896

Example of Fetching MAC Addresses Learned on a Port-Channel Using SNMP Use dot3aCurAggFdbTable to fetch the learned MAC address of a port-channel. The instance number is the decimal conversion of the MAC address concatenated with the port-channel number. MAC Addresses on Force10 System R1_E600(conf)#do show mac-address-table VlanId Mac Address Type Interface State 1000 00:01:e8:06:95:ac Dynamic Po 1 Active Query from Management Station >snmpwalk -v 2c -c techpubs 10.11.131.162 .1.3.6.1.4.1.6027.3.2.1.1.5 SNMPv2-SMI::enterprises.6027.3.2.1.1.5.1.1.1000.0.1.232.6.149.172.1 = INTEGER: 1000 SNMPv2-SMI::enterprises.6027.3.2.1.1.5.1.2.1000.0.1.232.6.149.172.1 = Hex-STRING: 00 01 E8 06 95 AC SNMPv2-SMI::enterprises.6027.3.2.1.1.5.1.3.1000.0.1.232.6.149.172.1 = INTEGER: 1 SNMPv2-SMI::enterprises.6027.3.2.1.1.5.1.4.1000.0.1.232.6.149.172.1 = INTEGER: 1 Deriving Interface Indices The Dell Networking OS assigns an interface index to each (configured and unconfigured) physical or logical interface, and displays it in the output of the show interface command. Dell#show interface fortyGigE 0/4 fortyGigE 0/4 is down, line protocol is down Description: if_0/4 | if_forty Hardware is DellForce10Eth, address is 74:86:7a:ff:6f:08 Current address is 74:86:7a:ff:6f:08 Pluggable media not present Interface index is 51528196 [output omitted] The interface index is a binary number with bits that indicate the slot number, port number, interface type, and card type of the interface. The system converts this binary index number to decimal, and displays it in the show command output. Figure 128. Example of Assigning Interface Index Numbers Starting from the least significant bit (LSB) in the preceding figure: • The first 14 bits represent the card type of a physical interface or the interface number of a logical interface. • The next 4 bits represent the interface type. • The next 12 bits represent the slot and port numbers. • The next bit is 0 for a physical interface and 1 for a logical interface. • The last next is unused. The Slot-Port Number value is derived from the slotId and portId parameters as follows: slotPortNum = ((slotId +1) * IFM_IFINDEX_MAX_PORTS_PER_SLOT + portId). The IFM_IFINDEX_MAX_PORTS_PER_SLOT value is 192 (10G). For backward compatibility, the IFM_IFINDEX_MAX_PORTS_PER_SLOT value is 128 on other Dell Networking switches. The slotId value is derived as follows: slotId = (slotPortNum / IFM_IFINDEX_MAX_PORTS_PER_SLOT) -1. The portId value is derived as follows: portId = slotPortNum % IFM_IFINDEX_MAX_PORTS_PER_SLOT. Simple Network Management Protocol (SNMP) 896