Hi all,
Can someone advice, why I'm getting a segmentation fault on a Linux system for a program which looks like the below one--:
typedef struct idev{
int p,
char q;
} Idev;
typedef struct abc{
int i;
Idev *idev_ptr;
} ABC;
int main(){
ABC a_var;
char str;
int... (4 Replies)
Is there a limit to the number of LUNS that can be concatenated using Solaris Volume manager with Soft partitions?
I have worked with some AIX admins in the past and there was such a limitation therefore limiting the size the filesystem could grow to.
Is there such a limitation in Solaris 9... (6 Replies)
I'm piping the results of a tcpdump into a shell script and want certain commands executed (specifically the firing of an SNMP alert) based on a grep for certain contents in the output of tcpdump.
For example, I have
#!/bin/bash
while read str; do
grep 'ttl 64' -q && sudo snmptrap -v 1... (2 Replies)
System: Sun M3000 and M4000
OS: Solaris 10 (fully up to date with latest patches)
iSCSI HBA: 2x QLE4060C (QLogic)
In each system are 2 QLE4060C iSCSI adapters.
I manage to set up both HBA's to connect to the LUNs on the SAN
However I don't manage to enable multi-pathing.
Made the... (4 Replies)
hi,
what are the steps to detect and configure a new attached lun in Solaris 10.
Is there any difference between cfgadm and luxadm command ?
rgds,
snjksh (5 Replies)
Hello guys, I'm going crazy over here with a problem with a LUN created on a EMC CX3.
I did sucessfully managed to create the LUN on the Storage (the LUN is named DBLNX25EC_TST), after doing the following process:
echo "1" > /sys/class/fc_host/host<n>/issue_lip
and
echo "- - -" >... (10 Replies)
need to do LUN masking at qlogic HBA level..at RHEL 5.x
I am using qla* module at part of the Unix kernel, it is not OEM drivers that come with the HBA card, so I can't use Sansurfer to do this..
Is there a way to do this at all ??
:wall: (0 Replies)
Hi All,
I'm using Solaris server, SunOS 5.10 Generic_144488-08 sun4u sparc SUNW, SPARC-Enterprise.
There is a newly created LUN of 250GB (EMC). I've scanned the system and able to see the new LUN.
For example:
103. emcpower19a <DGC-VRAID-0430 cyl 48638 alt 2 hd 256 sec 16>... (4 Replies)
Hi,
GetName()
{
if
then
echo " Please enter the name: "
read Name
tempvar=0
while read line
do
if
then
tempvar=`expr $tempvar + 1`
echo $tempvar
... (10 Replies)
How to get LUN WWN (i.e LUN mapped from a storage box say Symmetrix or clariion) in Solaris. fcinfo command does give the Target port wwn but what i'm looking for is the LUN WWN. Any help is appreciated. (2 Replies)
Discussion started by: Manish00712
2 Replies
LEARN ABOUT NETBSD
carp
CARP(4) BSD Kernel Interfaces Manual CARP(4)NAME
carp -- Common Address Redundancy Protocol
SYNOPSIS
pseudo-device carp [count]
DESCRIPTION
The carp interface is a pseudo-device which implements and controls the CARP protocol. carp allows multiple hosts on the same local network
to share a set of IP addresses. Its primary purpose is to ensure that these addresses are always available, but in some configurations carp
can also provide load balancing functionality.
A carp interface can be created at runtime using the ifconfig carpN create command.
To use carp, the administrator needs to configure at minimum a common virtual host ID and virtual host IP address on each machine which is to
take part in the virtual group. Additional parameters can also be set on a per-interface basis: advbase and advskew, which are used to con-
trol how frequently the host sends advertisements when it is the master for a virtual host, and pass which is used to authenticate carp
advertisements. Finally carpdev is used to specify which interface the carp device attaches to. If unspecified, the kernel attempts to set
carpdev by looking for another interface with the same subnet. These configurations can be done using ifconfig(8), or through the SIOCSVH
ioctl.
Additionally, there are a number of global parameters which can be set using sysctl(8):
net.inet.carp.allow Accept incoming carp packets. Enabled by default.
net.inet.carp.preempt Allow virtual hosts to preempt each other. It is also used to failover carp interfaces as a group. When the
option is enabled and one of the carp enabled physical interfaces goes down, advskew is changed to 240 on all
carp interfaces. See also the first example. Disabled by default.
net.inet.carp.log Log bad carp packets. Disabled by default.
net.inet.carp.arpbalance Balance local traffic using ARP. Disabled by default.
EXAMPLES
For firewalls and routers with multiple interfaces, it is desirable to failover all of the carp interfaces together, when one of the physical
interfaces goes down. This is achieved by the preempt option. Enable it on both host A and B:
# sysctl -w net.inet.carp.preempt=1
Assume that host A is the preferred master and 192.168.1.x/24 is configured on one physical interface and 192.168.2.y/24 on another. This is
the setup for host A:
# ifconfig carp0 create
# ifconfig carp0 vhid 1 pass mekmitasdigoat 192.168.1.1
netmask 255.255.255.0
# ifconfig carp1 create
# ifconfig carp1 vhid 2 pass mekmitasdigoat 192.168.2.1/24
netmask 255.255.255.0
The setup for host B is identical, but it has a higher advskew:
# ifconfig carp0 create
# ifconfig carp0 vhid 1 advskew 100 pass mekmitasdigoat
192.168.1.1 netmask 255.255.255.0
# ifconfig carp1 create
# ifconfig carp1 vhid 2 advskew 100 pass mekmitasdigoat
192.168.2.1 netmask 255.255.255.0
Because of the preempt option, when one of the physical interfaces of host A fails, advskew is adjusted to 240 on all its carp interfaces.
This will cause host B to preempt on both interfaces instead of just the failed one.
In order to set up an ARP balanced virtual host, it is necessary to configure one virtual host for each physical host which would respond to
ARP requests and thus handle the traffic. In the following example, two virtual hosts are configured on two hosts to provide balancing and
failover for the IP address 192.168.1.10.
First the carp interfaces on Host A are configured. The advskew of 100 on the second virtual host means that its advertisements will be sent
out slightly less frequently.
# ifconfig carp0 create
# ifconfig carp0 vhid 1 pass mekmitasdigoat 192.168.1.10
netmask 255.255.255.0
# ifconfig carp1 create
# ifconfig carp1 vhid 2 advskew 100 pass mekmitasdigoat
192.168.1.10 netmask 255.255.255.0
The configuration for host B is identical, except the skew is on virtual host 1 rather than virtual host 2.
# ifconfig carp0 create
# ifconfig carp0 vhid 1 advskew 100 pass mekmitasdigoat
192.168.1.10 netmask 255.255.255.0
# ifconfig carp1 create
# ifconfig carp1 vhid 2 pass mekmitasdigoat 192.168.1.10
netmask 255.255.255.0
Finally, the ARP balancing feature must be enabled on both hosts:
# sysctl -w net.inet.carp.arpbalance=1
When the hosts receive an ARP request for 192.168.1.10, the source IP address of the request is used to compute which virtual host should
answer the request. The host which is master of the selected virtual host will reply to the request, the other(s) will ignore it.
This way, locally connected systems will receive different ARP replies and subsequent IP traffic will be balanced among the hosts. If one of
the hosts fails, the other will take over the virtual MAC address, and begin answering ARP requests on its behalf.
Note: ARP balancing only works on the local network segment. It cannot balance traffic that crosses a router, because the router itself will
always be balanced to the same virtual host.
SEE ALSO netstat(1), sysctl(3), arp(4), arp(8), ifconfig(8), sysctl(8)HISTORY
The carp device first appeared in OpenBSD 3.5.
BSD October 16, 2003 BSD