I've run into a problem that I'm hoping you can sort out.
Whenever I run an arp -a or netstat -p the command hangs. It seems that the system is trying to reverse lookup a multicast address and this is what causes the issues.
The commands are actually generated via monitoring software so I am unable to simply stop performing reverse DNS lookups via the appropriate command switches.
I am able to replicate the issue if I add the same multicast route on another server, but the route disappears on the other servers after a few seconds so does not cause any hang.
Hi, there
On HP-UX, I want to multicast packets on two different IP network repectively.
The two NIC are configured with two different IP. The routes are added with one default and one net for each IP . The multisender programs bind their own local IP, multireceiver programs add the... (0 Replies)
On Linux, I have configured two different IP address for two network device eth0 ,eth1 , in my program, I want to multicast differently on these two network, I know it must add route for single network and I try to config another route for second network,but it can not work correctly, how to config... (0 Replies)
hi all
we upgraded hacmp(powerha) from 5.2 to 5.4 recently .
during the failover testing, we found a strange network issue. after standby node took service ip address (172.15.100.8) online at standby NIC, we were able to log in the standby node by telnet 172.15.100.8 which stays at... (1 Reply)
Hello all,
I have created a UDP multicast transmitter and receiver, first using windows. But now I need the receiver to run on Ubuntu 10.04.
The code is the following:
/************************** Receiver *************************/
// Module Name: Receiver.c
//
// Description:
// ... (0 Replies)
Hi,
I wanted to add route on the solaris 10 box as shown below.
route add -net 172.16.10.0 172.16.10.11
where 172.16.10.11 is the ip address of the solaris machine.
If I execute the above command I am getting the below error
gateway:172.16.10.11 Network is unreachable.
I am not... (1 Reply)
Hello,
I am setting up a new RedHat server with two network interfaces.
These interfaces are on different subnets, and connected to the same firewall.
I'm trying to reach a remote IP.
It works fine from the first interface.
The second interface however, is making ARP requests instead of... (0 Replies)
Hi please help,
theoretically I',m interested in starting a streaming service using multicast IP service. I'd like to know how do I get an IP address that I can send my data too? (please don't just point me too Internet Assigned Numbers Authority as ive been there and it just seem to state... (1 Reply)
Hi
We took the reboot of server/global zone after that Solaris 11 share local zone not able to ping the default gateway but global zone able to ping same default gateway. I check/compare the before activity logs of global zone and local zones which looks fine to me, further IP and netmask of... (6 Replies)
Discussion started by: sb200
6 Replies
LEARN ABOUT PLAN9
netmasks
netmasks(4) File Formats netmasks(4)NAME
netmasks - network mask database
SYNOPSIS
/etc/inet/netmasks
/etc/netmasks
DESCRIPTION
The netmasks file contains network masks used to implement IP subnetting. It supports both standard subnetting as specified in RFC-950 and
variable length subnetting as specified in RFC-1519. When using standard subnetting there should be a single line for each network that is
subnetted in this file with the network number, any number of SPACE or TAB characters, and the network mask to use on that network. Network
numbers and masks may be specified in the conventional IP `.' (dot) notation (like IP host addresses, but with zeroes for the host part).
For example,
128.32.0.0 255.255.255.0
can be used to specify that the Class B network 128.32.0.0 should have eight bits of subnet field and eight bits of host field, in addition
to the standard sixteen bits in the network field.
When using variable length subnetting, the format is identical. However, there should be a line for each subnet with the first field being
the subnet and the second field being the netmask that applies to that subnet. The users of the database, such as ifconfig(1M), perform a
lookup to find the longest possible matching mask. It is possible to combine the RFC-950 and RFC-1519 form of subnet masks in the net-
masks file. For example,
128.32.0.0 255.255.255.0
128.32.27.0 255.255.255.240
128.32.27.16 255.255.255.240
128.32.27.32 255.255.255.240
128.32.27.48 255.255.255.240
128.32.27.64 255.255.255.240
128.32.27.80 255.255.255.240
128.32.27.96 255.255.255.240
128.32.27.112 255.255.255.240
128.32.27.128 255.255.255.240
128.32.27.144 255.255.255.240
128.32.27.160 255.255.255.240
128.32.27.176 255.255.255.240
128.32.27.192 255.255.255.240
128.32.27.208 255.255.255.240
128.32.27.224 255.255.255.240
128.32.27.240 255.255.255.240
128.32.64.0 255.255.255.192
can be used to specify different netmasks in different parts of the 128.32.0.0 Class B network number. Addresses 128.32.27.0 through
128.32.27.255 have a subnet mask with 28 bits in the combined network and subnet fields (often referred to as the subnet field) and 4 bits
in the host field. Furthermore, addresses 128.32.64.0 through 128.32.64.63 have a 26 bits in the subnet field. Finally, all other
addresses in the range 128.32.0.0 through 128.32.255.255 have a 24 bit subnet field.
Invalid entries are ignored.
SEE ALSO ifconfig(1M), inet(7P)
Postel, Jon, and Mogul, Jeff, Internet Standard Subnetting Procedure, RFC 950, Network Information Center, SRI International, Menlo Park,
Calif., August 1985.
V. Fuller, T. Li, J. Yu, K. Varadhan, Classless Inter-Domain Routing (CIDR): an Address Assignment and Aggregation Strategy, RFC 1519,
Network Information Center, SRI International, Menlo Park, Calif., September 1993.
T. Pummill, B. Manning, Variable Length Subnet Table For IPv4, RFC 1878, Network Information Center, SRI International, Menlo Park, Calif.,
December 1995.
NOTES
/etc/inet/netmasks is the official SVr4 name of the netmasks file. The symbolic link /etc/netmasks exists for BSD compatibility.
SunOS 5.10 7 Jan 1997 netmasks(4)