+ Memory allocation failures have been observed on Linux systems with 64 MB
+ of RAM or less that are running Jumbo Frames. If you are using Jumbo
+ Frames, your system may require more than the advertised minimum
+ requirement of 64 MB of system memory.
+
+ Performance Degradation with Jumbo Frames
+ -----------------------------------------
+
+ Degradation in throughput performance may be observed in some Jumbo frames
+ environments. If this is observed, increasing the application's socket
+ buffer size and/or increasing the /proc/sys/net/ipv4/tcp_*mem entry values
+ may help. See the specific application manual and
+ /usr/src/linux*/Documentation/
+ networking/ip-sysctl.txt for more details.
+
+ Jumbo frames on Foundry BigIron 8000 switch
+ -------------------------------------------
+ There is a known issue using Jumbo frames when connected to a Foundry
+ BigIron 8000 switch. This is a 3rd party limitation. If you experience
+ loss of packets, lower the MTU size.
+
+ Multiple Interfaces on Same Ethernet Broadcast Network
+ ------------------------------------------------------
+
+ Due to the default ARP behavior on Linux, it is not possible to have
+ one system on two IP networks in the same Ethernet broadcast domain
+ (non-partitioned switch) behave as expected. All Ethernet interfaces
+ will respond to IP traffic for any IP address assigned to the system.
+ This results in unbalanced receive traffic.
+
+ If you have multiple interfaces in a server, either turn on ARP
+ filtering by entering:
+
+ echo 1 > /proc/sys/net/ipv4/conf/all/arp_filter
+ (this only works if your kernel's version is higher than 2.4.5),
+
+ NOTE: This setting is not saved across reboots. The configuration
+ change can be made permanent by adding the line:
+ net.ipv4.conf.all.arp_filter = 1
+ to the file /etc/sysctl.conf
+
+ or,
+
+ install the interfaces in separate broadcast domains (either in
+ different switches or in a switch partitioned to VLANs).
+
+ 82541/82547 can't link or are slow to link with some link partners
+ -----------------------------------------------------------------
+
+ There is a known compatibility issue with 82541/82547 and some
+ low-end switches where the link will not be established, or will
+ be slow to establish. In particular, these switches are known to
+ be incompatible with 82541/82547:
+
+ Planex FXG-08TE
+ I-O Data ETG-SH8
+
+ To workaround this issue, the driver can be compiled with an override
+ of the PHY's master/slave setting. Forcing master or forcing slave
+ mode will improve time-to-link.
+
+ # make EXTRA_CFLAGS=-DE1000_MASTER_SLAVE=<n>
+
+ Where <n> is:
+
+ 0 = Hardware default
+ 1 = Master mode
+ 2 = Slave mode
+ 3 = Auto master/slave
+
+ Disable rx flow control with ethtool
+ ------------------------------------
+
+ In order to disable receive flow control using ethtool, you must turn
+ off auto-negotiation on the same command line.
+
+ For example:
+
+ ethtool -A eth? autoneg off rx off