Cisco Switching/Routing :: 877 - Directing Static Ip Traffic To Certain Machine
Dec 18, 2011
We have one machine running an application accessible remotely. We have cisco877 router, and static ip to access the application remotely. We recently done an update of out application software which has changed the access port/link to application.
since we update the software We can access the application internally through local ip but is not accessible through WAN with static ip, as the port no has changed.
I not having much knowledge of networking don't know what changes should be made in router so it direct the traffic of static ip to the machine running the web application, as before.
I tried looking for clue in router through its SDM Express interface, but no joy.
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Aug 2, 2012
I have a Cisco Catalyst 2940 switch, eight ports. Ports 1-4 are connected to a media converter A. Ports 5-6 and 7-8 goes to two separate servers, B and C. Let's say I want traffic from B->5->1->A then through some equipment (which just pushes the data) and back through A->2->6->C without the data just recognizing a shorter path B->5->6->C and thereby skipping the equipment in between. Is this possible without a router? Ridiculous set-up? Yes, though the switch is the only means I have to connect to the media converter in this case.
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Feb 16, 2012
I have a new MPLS circuit being stood up for my site; it’s going to replace a site to site VPN connection to our "Headquarters." I want to test this without affecting my production networks. Without getting into alot of details, the admin at the remote site is not very cooperative and basically doesn't want to set this up and I don't have access to his switching/routing. He is prepared to do minimal tasks if necessary. Ultimately, I am looking to test the new Vlan, once successful, route the traffic away from the Site to Site VPN connection to the MPLS circuit. Here is what I plan on doing, I need to determine if it is going to work.
LAN in my office uses EIGRP for routing. MPLS (10.1.1.253) uses OSPF (area 0) and BGP. Currently, traffic destined to headquarters (10.10.1.1/24) uses the default route on a CAT3750 pointing to the firewall (ASA5520) (10.1.1.254).Create new VLAN/DHCP scope to use as a test Vlan to test the new MPLS circuit. 10.1.199.0/24Create static routes on 3750 destined for headquarters for L2L VPN traffic pointing to firewall so traffic to headquarters remains on the L2L connection. ip route 10.10.1.1 255.255.255.0 10.1.1.254 (once I share routes with OSPF, routes to Headquarters will be advertised over the MPLS)Create OSPF instance on the 3750 advertising only the new subnet so that the MPLS network knows to route this traffic over the MPLS for return traffic from headquarters. (this is where it is grey as I don’t know OSPF at all) The switch has a L3 interface which the MPLS router uses as its gateway, so there is direct communication.router-ospf 0 network 10.1.199.0 0.0.0.255 area 0 4. On 3750 create a PBR for the new subnet so that it is routed over the MPLS, (imagine test PC is 10.1.199.100), the remaining production subnets will use the static routes and ignore the OSPF routes because of the shorter administrative distance.Will the PBR route win over the static route for that one subnet? Is that all I need in the OSPF configuration? I see some configs that have neighbor statements with costs, authentication types etc..
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Feb 7, 2012
it is possible to let cat3750 or 2960 ports which only allow machine on network which it use dhcp, not static ip? if so, how to configure it?
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Aug 3, 2012
I have a 2911 router inside our network with both DHCP and DNS enabled. Everything works fine except since we use this router we are not being able to go to the network neighbourhood in Windows and look up machines by name (or typing \diskstation for example). Connecting by IP works fine but not by local machine names.
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Apr 3, 2013
I want to buy the CISCO C819G-4G-G-K9 M2M Router. Studying the characteristics as I always do, I discovered (incredible for me!) that so a sophisticated and expensive router has not the WLAN. Nevertheless, to have the Wi-Fi connection is essential for me.
which is the instrument or machine of Cisco that I must use to connect to the CISCO C819G-4G-G-K9 M2M Router and to have the WLAN 2.4/5 GHz? Will this be possible?
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Dec 30, 2011
I am monitoring 2 or more source interfaces which are running 1G traffic on each interface. Destination is 10G interface.There are 2 kinds of traffic running through the source interfaces: icmp and regular IP traffic. I am only interested in capturing icmp traffic. How can I achieve my goal?I don’t have any vlan traffic at all. Router is c6500.
source (1G) destination (10G)
------------------------- Router --------------------------------------Linux
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| source (1G)
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Jan 8, 2013
I am working on Cisco 3550 switch on a certain requirement. I have got an access point connected to the switch and few mobile phones connected to the access point. I get the list of mac addresses connected to the switch ( Both access point's mac address & the clients addresses) by "show mac-address table dynamic" command. However, i am unable/confused to get the output of the following scenarios:
1. I would require to export the mac address from the switch to the local machine in any format (May be by using an SNMP tool, if available) so that the same needs to be used in my C# for development.What would be the way for the same ?
2. The mac address in the mac address table doesn't get updated dynamically. (Eg Scenario: A wifi client gets connected to an access point which inturn is connected to the switch, the mac address of the client shows up in the switch table. However if the client is disconnected, the client's mac address would still be displayed in the switch table )
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Aug 22, 2011
I have a RV220W (running fw version 1.0.2.4) that i am trying to configure for a client. They are set up on Comcast with 13 available IP's. I should note that this netowrk is now currently running without issue using a Cisco Pix 506e. Unfortunately, the Pix is almost impossible to configure using the GUI now as I have to load a 4-year old version of Java now just to get the PDM to load. But I digress.I've set up the RV using the identical settings as the Pix on bth the LAN and WAN side. When I do, computers on the LAN side can all reach the Internet ok. However, once I enable one-to-one NAT for an internal server, that machine can't send or receive ANY traffic to the WAN side. I've even tried setting access rules enabling ANY traffic in both directions, and that has no effect. Either I'm missing something, or this is just one more bug in this product.
Even though it was a bit of a step down going from the Pix to the RV220W, it was done for the ease of setting up VPN's as I was ready to purchase a second one for a new satellite office opening in a few weeks. It looks like we will be switching vendors on the router side as my faith in Cisco is waning at this point.
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Aug 20, 2012
I have the following setup: Private network <-> SW <-> CISCO VPN <-> ISP MODEM
I have configured VPN part and is working correctly. I have a computer in the private network at static address 192.168.1.100 and an application is running on it on 8100 tcp port for clients.
Now I need to connect from the Internet to the application on 192.168.1.100 on port 8100.
How to configure CISCO router to forward traffic coming in tcp port 8100 to machine 192.168.1.100?? ISP Modem is going to handover all the traffic to CISCO device.
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Feb 16, 2013
Region : Hongkong
Model : TL-WDR4900
Hardware Version : V1
Firmware Version : 3.14.0 Build 130206 Rel.34701n
ISP : PCCW Netvigator
I have bought tp-link wdr-4900 for several days and encounter the following problems
1) nfs is not work, whenever I set up the nfs server (using hanewin nfs server), the media player fails to read the media file. (Problem does not appear for the previous ASUS n56u)
2) When there is large traffic rate (e.g. BitTorrent), the whole machine is very unstable, LAN and Wireless dies (SSID disappears, and LAN appears "ERR Connection" and "DNS not respond"), give me a feeling that the router cannot handle high traffic rate and the whole machine slows down and fails.
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Dec 27, 2012
I have a stack of 2 x 3750X switches these are running 12.2(55)SE5. I needed to add some static IP routes and found that the ‘ip routing’ command is not supported. I came across a document that stated “On switches running the LAN base feature, static routing on VLANs is supported only with Cisco IOS Release 12.2(58)SE and later.” So I have upgraded to 12.2(58)SE2, but ‘ip routing’ is still not a valid command.
The release notes state:“On the Cisco Catalyst 3560-X and 3750-X Series, it adds support for 16 static IPv4 routes in the LAN Base image.”
I have read other posts that talk about running the ‘sdm prefer routing’ command which I have done, but I am still unable to add any routes or run the ‘ip routing’ command.
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May 28, 2013
Two Cisco C2960G Switches connected with each other using an EtherChannel Trunk Ports.IOS Image has been upgraded to c2960-lanbasek9-mz. 122- 58.SE2.bin.The global command "sdm prefer lanbase-routing" has been executed to set the default template to "lanbase-routing".The global command "ip routing" has been executed to enable the ip routing.An IP route has been configured in each switch to point to each other for the static routing purpose (Please see the 2 attached configuration files) The hosts in VLAN 111 and VLAN 110 are not able to see each other even the ip static routes have been configured.May be I have misconfigured some settings but not sure what's the actual problem.
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Dec 3, 2011
asa 5505 is on head office.is it possible to configure it as a router from headoffice to branches 1,2 and internet [code]
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Sep 2, 2012
I have a Cisco 1841 router at home with version 12.4(13r)T advanced ip services. The setup is extremely simple:
1) PPPOE dialer to my service provider over ADSL
2) Nat overload on the dialer interface.
3) 2 V LAN s one for home network (wired) and one for wireless both v LAN's are connected through interface v LAN s respectively.
My problem is when I configure static NAT to map RDP or any other protocol to inside hosts this does n`t work.
"
ip nat source static tcp 192.168.20.3 2222 interface Dialer1 2222
ip nat source static tcp 192.168.20.3 3389 xx.xx.xx.xx 3389 extendable
ip nat inside source list 20 interface Dialer1 overload
"
When I open wire shark and sniff the traffic on home computer which is the one I`m trying to reach I can't see any traffic. And While performing Nat debugging I am also not able to see traffic going to that port (for example 3389).
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Apr 22, 2013
I just did configuration on Cisco 892F router. Everything works fine, but static nat is not working. I create static nat on tcp port 80 (http). I don't know where is the problem. All nats working fine except static nat. Even though internet connection is ok in my lan.
i cannot access my router from the internet.
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Jan 5, 2013
I guess i am just getting old and forgot how this works, or i have an IOS load with an undocumented feature in it.A customer of ours wishes to have their exchange server appear to the outside world on a seperate IP address as their public pool address is.in the past this has not been an issue, however in the current configuration we are unable to get the source address to appear per the NAT statement it always sources on the overloaded IP. below is the relevant NAT config, am i missing something, or have i hit a IOS feature? [code] There is a 45% chance i have forgotten everything i learned on the NOC desk and a 50% chance that it is somethine really stupid and 5% IOS is broken
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Aug 23, 2011
I've 8 Static IP assigned me from my ISP.
x.y.w.56 (not usable)x.y.w.57x.y.w.58x.y.w.59x.y.w.60x.y.w.61x.y.w.62x.y.w.63 (no usable)Subnet 255.255.255.248
I've a 877 Router and I would to:NAT al LAN Client with x.y.w.57Configure some ports ( i.e. 80 and 443) to be forewarded from x.y.w.57 to one LAN Server ( i.e. 192.168.0.1)Configure some ports ( i.e. 443) to be forewarded from x.y.w.58 to another LAN Server ( i.e. 192.168.0.2)
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Sep 12, 2012
We upgrade our Internet service in our India office which required a new router. The local vendor suggested an 1841, so that is what we have. It has two fastethernet ports on it.
The ISP (Airtel) provided the following IP address information:
Public WAN IP : 122.181.23.200/30
WAN IP : 122.181.23.202SUBNET MASK : 255.255.255.252GATEWAY : 122.181.23.201Pri DNS : 125.22.47.125Sec DNS : 202.56.250.5
[Code]......
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Mar 11, 2012
I am trying to configure a Cisco 871 router.I have 3 servers on my network that need static public IPs but also still need to communicate on the local network.
I have given my WAN interface the first IP in the block and set up PAT for the rest of the computers on the network which is working fine. Next I set up static NAT rules for the servers translating 3 of the remaining public IPs to the internal addresses of the servers.
I can access those servers internally using the public IPs but not from outside the network. A tracroute from outside the network gets dropped when it gets to my ISP.
I've never configured more than one static ip for a network before and i know i've just missed a step here. Do I also need to set up static routes? Will that update the next hop's routing table?
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Dec 3, 2012
i'm going to configure a 881-k9 with:
- Ethernet 0/0 LAN (Private Address)
- Ethernet 0/1 ISP1 (Public Address 1)
- Ethernet 0/2 ISP2 (Public Address 2)
find some configuration example to:
- have load balancing over the two ISP connection, used to connect to Internet
- configure Static NAT to bind:
- TCP 443
- TCP 1723on ISP1 e ISP2 Interface to a LAN Address (SBS2008 Server)
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Jul 30, 2012
We have two sites: 192.168.100.x and 192.168.101.x currently connected via IPsec VPN. On each end we have a Cisco ASA 5505. However, each site also has an MPLS VPN with intentions to move all traffic to this link. Will this work on the ASA? We need to make sure traffic can hit the ASA @ site A on the inside interface and trafiic will forward to the MPLS VPN router which then handles the traffic. Too, will it cause any problems in bi-directional flow between the two sites?
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Feb 12, 2013
I have a Cisco 2911 router and a Cisco 2960 switch at a remote location.I have a user who will work out of this office a few days out of the week and will need to obtain the same IP address everytime the user visits this office. This office has no file server, no dhcp server. I have the user's MAC address and for now, the user is getting an IP address that is leased for 30 days. I'm trying to find the best way to configure either the router or switch or both so that each time this user connects to this office, that user device will always pull the same IP address and of course no other device will use that IP.
I've did some research in creating a small vlan possibly, and assigning it specifically to the port# that the user's desk is at, but not sure if that's the best way or exactly sure how it'll work. I'm currently studying for my CCNA so this is all new to me and I'm trying to do research and test without obviously causing production issues especially given this is a remote site and I access these devices via putty. I can however drive to the site if needed for testing, but I'd like to have a good grasp on what method I'll be using that will work before I actually make the trip.
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May 29, 2012
this is router 887, its vlan is 192.168.3.1/24. If I'd like to add a static route via different host within same vlan, rather than the router, like:
ip route 192.168.100.0/24 192.168.3.6
How can we achieve it? I tried adding it directly and failed:
(config)#ip route 192.168.100.0 255.255.255.0 192.168.3.6
%Invalid next hop address (it's this router)
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Feb 2, 2013
I used to use a CentOS self-made server for intranet for my little office, but I bouth few days ago a Cisco 861 router to replace the linux box.
1. I have 2 public IP classes from my ISP. 1 class is limitted to 80mbit upload, the other to 30mbit upload. So I need some sort of DNAT to be able to know exactly which intranet computer uses big internet and which one limitted internet.
2. I need DHCP server and with static IP addresses (one computer must always have the same IP address, etc).. i have my needs for this.
3. Also I need external access to some servers inside (web, ftp, etc) [code]
So far so good, all looks simple and I can achieve this in 2 hours on a centos linux box (correct routes, ip forwarding enabled and few iptables rules for NAT/SNAT/DNAT).
But on this brand new Centos router well, i'm not even successful in pinging the outside world, nor the inside world I'm tired of reading the forums, the documentation..i want (at first) a simple scenario: vlan+dhcp, fa4 with 1 public ip address and ACCESS to the real world. I wasn't able to achieve not even that much. [code]
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Mar 16, 2013
establishing a Static NAT on an 1841 router.
I'm at a FOX affiliate TV station, and in order to connect our EAS Device to the internet & Fox Splicer, I need to setup a Statio NAT, so we picked up an 1841 on eBay.
I've done a little configuration in HyperTerminal.
I've done these ip addresses:
FE0/0 10.1.10.13 this is the subnet our EAS device is on
FE0/1 10.110.81.174 this is the subnet of the Fox Splicer.
I need to have NAT translate 10.1.10.11 to 10.110.81.170 and I also need to set a route for 10.110.81.0/24 pointing to 10.110.81.161
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Nov 7, 2012
I have an ASA 5510, with Ethernet0 connected to Internet via a T1 line, Ethernet1 connected to LAN1, and Ethernet2 connected to LAN2. LAN1 & LAN2 are independant, but share the Internet connection, via the T1 line. On LAN2, I have another router that connects to the Internet, via a Comcast line. I wish to route some of the traffic on LAN2 (10.38.77.0) to the other Router, on LAN2 (10.38.77.12) (connected to the Comcast line). I have entered the following lines:
route inside2 10.11.0.0 255.255.0.0 10.38.77.12 1
route inside2 10.252.0.0 255.255.0.0 10.38.77.12 1
route inside2 172.22.6.0 255.255.255.0 10.38.77.12 1
I can trace the routes from the ASA 5510 (1st hop is to 10.38.77.12), but not from anything else on LAN2.
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Apr 2, 2012
We're in the process of swapping in a new pair of ASA5520s and Catalyst 3750s to support two separate business units. We want Firewall A and Switch A to handle traffic for Org A (VLAN 100). Similarly, firewall B and Switch B should handle traffic for Org B (VLAN200). But we want to be able to fail traffic over in case of firewall or switch failure. Traffic between the two Orgs is being routed at the switch level. [code]
The uplink interface on each switch is currently a routed port with a static address on the uplink subnet. This works fine in a normal state. However, when we fail over one of the firewall contexts to the other chassis, this results in the inability to route internal traffic because the internal interface is now physically connected to a different switch with a different IP port address (obvious in hindsight). The question is, rather than a routed port, what would be the proper way to handle traffic between the switches and firewalls in a failover scenario? If I make the uplink ports into trunks, won't this cause all packets destined for either firewall to hit both both? Seems like that's not the way to go either? [code]
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Oct 3, 2010
We've got a cisco 2821 router which periodically stops routing all traffic. It seems to happen about once every 2 weeks, and I can't find anything that could be causing it. There are no entries in the log and the router stays up and running but requires a restart to begin processing traffic again. We're running 12.4(13r)T11.Any thoughts, or troubleshooting steps to track this down?
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May 29, 2012
We have a Catalyst 6509 switch, and we hope to use policy based routing to redirect http traffic to my proxy server, where I can find the configuration example?
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Feb 21, 2013
I have an 891w as my edge device for my home office. I have a VLAN for family use (wired and wireless) that routes out to the internet just fine. I have a second VLAN assigned to a VPN tunnel that backhauls traffic to my corporate network (wired and wireless) and all of the traffic gets to the corporate network fine when I am on that VLAN.
However, while I am on the VPN VLAN, no traffic gets to the internet. I believe it is because I have the gateway of last resort (0.0.0.0) set to the WAN IP address provided by my ISP, so DNS is resolving against corporate, but because there is no specific route, it is trying to dump the traffic back out the WAN without traversing the VPN tunnel.
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Aug 2, 2011
I have a strange error on my home network that I cannot find a solution to.I have an Huawei SmartAX MT882 from TalkTalk acting as a modem connected to a D-Link DSL-G624T acting as a router/switch. Connected to the D-Link I have a Windows 7 Pro machine (64-bit, SP1) and an XP (home i think) machine (sp 2 i think).The SmartAX modem is set up to perform DHCP and DNS relaying and the D-Link has DHCP turned off and DNS relay turned off.The Win7 machine can access the network, get an IP address and access the internet without problems, regardless as to the status of the XP machine.The XP machine can access the network, get an IP address and access the internet with no problems ONLY of the win7 is powered up. When the win7 machine is off, the XP machine seems to drop about 25% of the ping packets between it and the D-Link router and has no internet access (because of this i assume). [code]
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Aug 3, 2012
Is there a way to set static routes per VLAN?Example VLAN 100 sends all traffic to 192.168.1.1 and VLAN 200 sends all traffic to 10.1.1.1. (2800 Series RTR)I have 5 networks that have their own gateway to the Internet via satellite link. Those networks run over the same infrastructure on separate VLANs. They frequently send traffic to each other, which gets sent over a slow SAT link. I introduced a router to the network and would like to set all my hosts default gateway to the local routers sub-interface then have a static route that send all traffic that is not on one of my 5 networks back to that VLANs respective SAT modem to get routed out over the Internet.
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