search for: hsrp

...de-2.odc.reconnex.net.50532 > 172.20.241.255.us-srv: UDP, length 21 03:09:51.338364 IP 192.168.1.7.50532 > 192.168.1.255.us-srv: UDP, length 21 03:09:51.338370 IP 192.168.1.7.50532 > 192.168.1.255.us-srv: UDP, length 21 03:09:51.768831 802.1d unknown version 03:09:52.296306 IP 172.20.241.2.hsrp > 224.0.0.102.hsrp: HSRPv1 03:09:52.296536 IP 172.20.242.2.hsrp > 224.0.0.102.hsrp: HSRPv1 03:09:52.309577 IP 172.20.241.3.hsrp > 224.0.0.102.hsrp: HSRPv1 03:09:52.309808 IP 172.20.242.3.hsrp > 224.0.0.102.hsrp: HSRPv1 03:09:52.972411 IP 10.213.132.83.63941 > dev-130.odc.reconnex.net...

...uplink to upstream provider, and is in VLAN-1 - Switch 1, Port 25+26 are trunked (link aggregation; depends on your terminology; these are procurve 2600's) and connected to Switch 2, Port 25+26. All vlans configured run on the trunked link, with tagging. - Uplinks to provider are running HSRP. Upstream provider creates a virtual IP (say, 2.2.2.1) that is the gateway to the outside world on one of the links, randomly. - Server A is connected to Switch 1, Port 2 on eth0; and Switch 2, Port 2 on eth1. Server is assigned an IP address, say, 1.1.1.2, inside VLAN-2 (1.1.1.0/24) - Serv...

...| Firewall WAN LAN Empty Empty Empty Empty Empty Empty | | | | | | | | eth0 eth1 eth2 eth3 eth4 eth5 eth6 eth7 ----------------- ------------------- PCI-X PCI Both routers use HSRP from Cisco to share information about who is alive. This app uses multicast UDP packets to 224.0.0.1 address, port 1985. The problem is, after a while (1 or 2 minutes) the CPU reaches 100% (0.99 load 99% System) with the process ksoftirqd_CPU0 reaching 99%. Using iptraf we discover ethernets 4 t...

Hi all, I am trying to come up with an architecture that has some redundancy. The idea is to hook up the two GbE LAN interfaces of a CentOS server to two Gigabit Ethernet switches. In case one switch goes down, there is a redundant path (the server is redundant too). Here is the idea: ----------- | GbE | PCs

...# time id userid uid=36923(userid) gid=36923(u_036923) groups=36923(u_036923) real 0m10.509s user 0m0.030s sys 0m0.090s ********** Route**************** [root at linux]# traceroute transporter02 traceroute to transporter02.domain.com (IP), 30 hops max, 46 byte packets 1 nlamsdc2mp078-hsrp.net-equip.domain.net (IP) 0.000 ms 0.000 ms 0.000ms 2 transporter02.domain.com (IP) 0.000 ms 0.000 ms 0.000 ms solaris# traceroute transporter02 traceroute to transporter02.domain.com (145.6.246.53), 30 hops max, 40 byte packets 1 transporter02.domain.com (145.6.246.53) 0.462 ms 0.279...

I have question about multipath routing. I am running a 2.6.7 kernel (gentoo). I have a route with three nexthops on the same interface. I see a different nexthop being picked for different destination addresses. All is fine. Now if one of the nexthop goes down (arp entry times out and arp request doesnt get a response), does it remove the nexthop from contention and only use the remaining two

We have a client that wants to bond 2 DSL circuits instead of getting a T-1 (or similar) at their office to run their VoIP traffic on. We came across this Multihomed Gateway (MH200): http://www.cyberpathinc.com/mh200/details.htm Does anybody think this would work if installed at the client location handling NAT for 10 Cisco 7960's and connecting to our public asterisk server? My concern

Solution is really simple. Since this server is dual-homed ( 2 nic's ), i suggest setup advanced routing tables. The short version of howto setup. edit /etc/iproute2/rt_tables and Add : 10 OfficeLan 20 InternetWan Lookup the routing tables: ip route show table OfficeLan ip route show table InternetWan The default gateway's is to the internet. ( change ethX to you network interface

First, I'd like to configure my system to forward ip, to act as a gateway for my network. I've always used a script during startup to do this: echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -A POSTROUTING -o ${UPLINK} -j SNAT --to ${IP_NAT} This works fine, however I want this permanent so I don't have to run the script on startup. I have the firewall setup with SNAT

Hello all, This has been making me crazy for a while, but it seems like a really easy fix. I just can't figure out what it is. Any ideas would be greatly appreciated. I have two Linux machines existing on a mostly MS network and have samba running well on each. However, one machine resolves the wrong ip address of the other machine. Here's the setup. Machine 1: Laptop uses DHCP to

I am unable to ping NE.TW.RKB.IP1 from an outside network. Other machines which do not have access or routes for NET.WOR.KA.0 respond just fine. How do I get it to respond on both NET.WOR.KA.0 and NE.TW.RKB.0 given all default traffic should go through NET.WOR.KA.1 unless it is in reply to traffic from NE.TW.RKB.1 or there is an outage. [root at host20 ~]# route -n Kernel IP routing table

hi all, i got flooded by these msgs like 1000+ lines, any idea? my kernel is dated Nov-30 FreeBSD 4.9-stable # tail -f /var/log/messages Jan 18 19:43:23 xb /kernel: arp: 202.79.180.1 moved from 00:04:5a:49:eb:74 to 00:50:0f:4f:c0:00 on rl0 Jan 18 19:45:06 xb /kernel: arp: 202.79.180.1 moved from 00:50:0f:4f:c0:00 to 00:04:5a:49:eb:74 on rl0 Jan 18 19:45:18 xb /kernel: arp: 202.79.180.1 moved from

Hi. I''m wondering if there''s a good way to configure a Linux firewall box to failover to a single backup server, while preserving connection state. This question has been asked before, but the latest reference I can find is from 2004, at which time Linux had no equivalent of OpenBSD''s pfsync, though Harald was said to be working on one. Did anything come of those

Hey, The company I work for is in the market for a new firewall. Right now we're hosting all of our own stuff (on CentOS servers) behind an old checkpoint firewall. I think Checkpoint is overkill for our needs and very expensive, plus I don't like the "per-user" charges of some commercial solutions. What do you guys suggest that we upgrade to? Here are some of the

Greetings to all, To start I’ll firstly lay down the foundation to what I have done so far and if those of you on the list can provide further insight, tips, links etc. This scenario consists of 2 firewalls (both running Debian “etch”), 2 Cisco routers (unsure of model numbers) connected together like so in the diagram below. ----------------------- | Uplink Provider |