By GuruFocus, Contributor We have just updated the portfolio of Ken Fisher. He buys Apple Inc, Basf SE, American Express Co, McDonald’s Corporation, Rio Tinto PLC, BP etc. As of 03/31/2013, Fisher Asset Management, LLC owns 483 stocks with a total value of $37.6 billion. These are the details of the buys and sells that have the impact to portfolio of more than .1%. New Purchases: CSTR, VSH, VALE.P, Added Positions: AAPL, BASFY, AXP, MCD, RIO, BP, CSCO, JPM, MTU, RHHBY, Reduced Positions: AMX, PBR, V, BIDU, EC, VALE, BRGYY, EAT, Sold Out: KMTUY, MW, For the details of Ken Fisher’s stock buys and sells, go to http://www.gurufocus.com/StockBuy.php?GuruName=Ken+Fisher
Tag Archives: MTU
Invisibility cloak research moves forward at MTU
(Phys.org) —Michigan Technological University’s invisibility cloak researchers have done it again. They’ve moved the bar on one of the holy grails of physics: making objects invisible. Just last month, Elena Semouchkina, an associate professor of electrical and computer engineering at Michigan Tech, and her graduate student, Xiaohui Wang, reported successful experimental demonstration of the use of non-conductive ceramic metamaterials to cloak cylindrical objects from microwave-length electromagnetic waves. Previously, Semouchkina had designed a non-conductive glass metamaterial cloak that worked with infrared frequency waves, which are shorter than microwaves. …read more
Source: FULL ARTICLE at Phys.org
IP fragmentation problem
By arichard
Hello all, I am experiencing a problem with IP fragmentation.
I am receiving an udp packet that is larger than the MTU and it is fragmented along the network.
I am receiving the two fragments but they are not being reassembled correclty.
I am receiving an udp packet that is larger than the MTU and it is fragmented along the network.
I am receiving the two fragments but they are not being reassembled correclty.
The MTU of the system is 1500 and I cannot increase it, because I am getting this error: SIOCSIFMTU: Numerical result out of range.
Is it necessary to build the kernel with support for jumbo frames?
There’s any option that should be enabled on the kernel (2.6.34.8) to support this feature? Shouldn’t this be a default feature?
Any hint that may assist in debugging this issue is welcome.
The first packet it is considered (bad) as a complete packet and I am getting an error at the app level.
https://picasaweb.google.com/1053854…94371327482338
The second packet is the last part of the fragment which should be ignored completely:
https://picasaweb.google.com/1053854…94366260648562
As reference I am sending the same packet to my laptop which is implementing correctly the fragmentation re-assembly:
https://picasaweb.google.com/1053854…94364006259698
…read more
Source: FULL ARTICLE at The UNIX and Linux Forums
RHEL 5.5 NIC Bonding
By tjcooper
I am new to linux. I have a falconstor CDP installation which runs on RHEL 5.5 (Tikanga). There is a vendor option to bond nics in either 802.3ad or round robin, I choose 802.3ad. The server is connected to a Cisco 3750 switch.
The problem is dropped packets and eth03 wont come up in the PO (suspended). I am getting reports of dropped packets. When I look at the network files, things dont look right. I am not posting this without doing homework, I have spent the last couple days looking into RHEL NIC Bonding. At this point, I need help, before I make the changes I think are necessary. I dont think Eth0 should have an IP and I am not entirely sure what kind of load-balancing RHEL supports.
This is what is on the server
DEVICE=bond0
IPADDR=192.168.0.27
NETMASK=255.255.255.0
USERCTL=no
BOOTPROTO=none
ONBOOT=yes
MTU=1500
BONDING_OPTS=”mode=4 miimon=100 updelay=60000″
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=none
#IPADDR=192.168.0.27
#NETMASK=255.255.255.0
HWADDR=00:23:7d:e1:f8:66
DHCP_HOSTNAME=
MTU=1500
MASTER=bond0
SLAVE=yes
DEVICE=eth1
ONBOOT=yes
BOOTPROTO=none
#IPADDR=10.0.0.3
#NETMASK=255.255.255.0
TYPE=Ethernet
HWADDR=00:23:7d:e1:f8:68
DHCP_HOSTNAME=
MTU=1500
MASTER=bond0
SLAVE=yes
DEVICE=eth2
ONBOOT=yes
BOOTPROTO=none
#IPADDR=10.0.0.4
#NETMASK=255.255.255.0
TYPE=Ethernet
HWADDR=00:23:7d:e1:f8:6a
DHCP_HOSTNAME=
MTU=1500
MASTER=bond0
SLAVE=yes
DEVICE=eth3
ONBOOT=yes
BOOTPROTO=none
#IPADDR=10.0.0.5
#NETMASK=255.255.255.0
TYPE=Ethernet
HWADDR=00:23:7d:e1:f8:6c
DHCP_HOSTNAME=
MTU=1500
MASTER=bond0
SLAVE=yes
Modprobe.config
alias bond0 bonding
alias eth0 bnx2
alias eth1 bnx2
alias eth2 bnx2
alias eth3 bnx2
alias scsi_hostadapter cciss
alias scsi_hostadapter1 libata
alias scsi_hostadapter2 ata_piix
options scsi_mod max_luns=1
options sd_mod max_scsi_disks_fs=1
options bonding max_bonds=1
options bond0 miimon=100 mode=4 updelay=60000
CISCO SWITCH
*each port looks like this
interface GigabitEthernet1/0/5
switchport access vlan 500
switchport mode access
switchport nonegotiate
channel-group 1 mode active
spanning-tree portfast
end
*load-balance
SCHQYADR3750#show etherchannel load-balance
EtherChannel Load-Balancing Operational State (src-mac):
Non-IP: Source MAC address
IPv4: Source MAC address
IPv6: Source IP address
…read more
Source: FULL ARTICLE at The UNIX and Linux Forums