02-06-2009
Help with Default Gateway
Hi,
I have two interfaces on m AIX 5.3 box. One going to 192.168.1.x and it has a gateway of 192.168.1.1.
I configured the other gateway with 192.168.2.x and the default gateway as 192.168.2.1. But I can't get connectivity to the 192.168.2.1 network. Can someone help me out and let me know what's needed?
I've used smitty route and the chdev command but still not able to get connectivity to the 2.x network.
9 More Discussions You Might Find Interesting
1. HP-UX
I am using HP-UX 11i and I need to add another default gateway.
how can I do that ? (3 Replies)
Discussion started by: salhoub
3 Replies
2. Solaris
my actual default gatewas IP is:
default 192.168.11.254
and I need to change it to 192.168.11.2, I'm using Solaris 9, how can i do it? and how i can save it in case that the machine restart and have the new default gateway IP saved? (5 Replies)
Discussion started by: Lestat
5 Replies
3. IP Networking
i'm a real unix newbie, setting up a network, with a router to router vpn connection with a remote site, all the win stuff is talking and pinging and all the stuff it should be doing (yeah and crashing too, lol) but no communication with the unix box, i think the problem is with my default... (3 Replies)
Discussion started by: smcg
3 Replies
4. HP-UX
where in configuration files can i modify default gateway in hp-ux11iv3 (5 Replies)
Discussion started by: h@foorsa.biz
5 Replies
5. Linux
Dear Sir
I am a newbie in the world of IP telephony. I have been working with Asterisk PBX (SIP) and Cisco Call Manager (MGCP) but now I am learning on how to work GNUGK for H.323 Gatekeeper.
I am having a problem, configuring static call routing on GNUGK
in the section
... (0 Replies)
Discussion started by: mfondoum
0 Replies
6. Red Hat
Hi,
Here is the issue: There are 2 identical systems in the same subnet here. They can ping and ssh each other. One can ping the default gateway and one can not with error '... icmp_seq Destination Host Unreachable'. I can't find any difference between the two systems in terms of network... (4 Replies)
Discussion started by: aixlover
4 Replies
7. Red Hat
Hi..I have to change default gateway in my linux machine. Its OS is RHEL6.
I followed following steps.
1.run command ip route to check current default gateway
2.delete that gateway with command
route del default gw x.x.x.x eth2
3.Add new gatewy with command below
route add default gateway... (3 Replies)
Discussion started by: deljatt
3 Replies
8. IP Networking
I am am using IPv6 IP's with an OS of Debian.
Is it possible to set a *static* default gateway w/o the router being connected? Will that gateway change when the router is connected?
TIA (0 Replies)
Discussion started by: Meow613
0 Replies
9. UNIX for Beginners Questions & Answers
Dear friends
I use RedHat 6.5, which sets the gateway in the configuration file / etc / sysconfig / network as GATEWAY = 192.168.1.26, and the gateway in the configuration file / etc / sysconfig / network-scripts / ifcfg-eth11 as GATEWAY = 192.168.1.256. The two gateways are different.... (6 Replies)
Discussion started by: tanpeng
6 Replies
GRE(4) BSD Kernel Interfaces Manual GRE(4)
NAME
gre -- encapsulating network device
SYNOPSIS
To compile the driver into the kernel, place the following line in the kernel configuration file:
device gre
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
if_gre_load="YES"
DESCRIPTION
The gre network interface pseudo device encapsulates datagrams into IP. These encapsulated datagrams are routed to a destination host, where
they are decapsulated and further routed to their final destination. The ``tunnel'' appears to the inner datagrams as one hop.
gre interfaces are dynamically created and destroyed with the ifconfig(8) create and destroy subcommands.
This driver corresponds to RFC 2784. Encapsulated datagrams are prepended an outer datagram and a GRE header. The GRE header specifies the
type of the encapsulated datagram and thus allows for tunneling other protocols than IP. GRE mode is also the default tunnel mode on Cisco
routers. gre also supports Cisco WCCP protocol, both version 1 and version 2.
The gre interfaces support a number of additional parameters to the ifconfig(8):
grekey Set the GRE key used for outgoing packets. A value of 0 disables the key option.
enable_csum Enables checksum calculation for outgoing packets.
enable_seq Enables use of sequence number field in the GRE header for outgoing packets.
EXAMPLES
192.168.1.* --- Router A -------tunnel-------- Router B --- 192.168.2.*
/
/
+------ the Internet ------+
Assuming router A has the (external) IP address A and the internal address 192.168.1.1, while router B has external address B and internal
address 192.168.2.1, the following commands will configure the tunnel:
On router A:
ifconfig greN create
ifconfig greN inet 192.168.1.1 192.168.2.1
ifconfig greN inet tunnel A B
route add -net 192.168.2 -netmask 255.255.255.0 192.168.2.1
On router B:
ifconfig greN create
ifconfig greN inet 192.168.2.1 192.168.1.1
ifconfig greN inet tunnel B A
route add -net 192.168.1 -netmask 255.255.255.0 192.168.1.1
NOTES
The MTU of gre interfaces is set to 1476 by default, to match the value used by Cisco routers. This may not be an optimal value, depending
on the link between the two tunnel endpoints. It can be adjusted via ifconfig(8).
For correct operation, the gre device needs a route to the decapsulating host that does not run over the tunnel, as this would be a loop.
The kernel must be set to forward datagrams by setting the net.inet.ip.forwarding sysctl(8) variable to non-zero.
SEE ALSO
gif(4), inet(4), ip(4), me(4), netintro(4), protocols(5), ifconfig(8), sysctl(8)
A description of GRE encapsulation can be found in RFC 2784 and RFC 2890.
AUTHORS
Andrey V. Elsukov <ae@FreeBSD.org>
Heiko W.Rupp <hwr@pilhuhn.de>
BUGS
The current implementation uses the key only for outgoing packets. Incoming packets with a different key or without a key will be treated as
if they would belong to this interface.
The sequence number field also used only for outgoing packets.
BSD
November 7, 2014 BSD