FTOS Configuration Guide for the C-Series - Force10 Networks

Figure 109 show mac learning-limit violation Command Example
Force10(conf-if-gi-3/8)#do mac learning-limit reset
Force10(conf-if-gi-3/8)#2d21h50m: %RPM0-P:CP %IFMGR-5-OSTATE_UP: Changed interface state to
up: Gi 3/8
2d21h50m: %RPM0-P:CP %IFMGR-5-ACTIVE: Changed Vlan interface state to active: Vl 1
Note: In the MAC Learning Limit section, above, “interface” refers to either ports or port channels (static
LAG or LACP LAG).
NIC Teaming
NIC teaming is a feature that allows multiple network interface cards in a server to be represented by one
MAC address and one IP address in order to provide transparent redundancy, balancing, and to fully
utilize network adapter resources.
Figure 110 shows a topology where two NICs have been teamed together. In this case, if the primary NIC
fails, traffic switches to the secondary NIC, since they are represented by the same set of addresses.
Figure 110 Redundant NICs with NIC Teaming
MAC: A:B:C:D A:B
IP: 1.1.1.1
X
Active Link
Port 0/1
Port 0/5
fnC0025mp
When NIC teaming is employed, consider that the server MAC address is originally learned on Port 0/1 of
the switch (Figure 111). When the NIC fails, the same MAC address is learned on Port 0/5 of the switch.
The MAC address must be disassociated with the one port and re-associated with another in the ARP table;
in other words, the ARP entry must be “moved.” To ensure that this happens, you must configure the
command mac-address-table station-move refresh-arp on the Force10 switch at the time that NIC
teaming is being configured on the server.
Note: If this command is not configured, traffic continues to be forwarded to the failed NIC until the ARP
entry on the switch times out.
202 Layer 2