Cisco WAN :: Setting Up 1921 With Two Ethernet WAN Ports Going To Two Separate ADSL ISP
Feb 17, 2011
I am setting up a 1921 with two ethernet WAN ports going to two seperate ADSL ISP's (via bridged modems) and one connecting to the internal LAN. There is a single e-mail / web server behind the router.
I have been reading the following which is exactly what we want to do, but I have questions. Maybe failover would be better because Load Balancing seems a little too quirky without BGP. url...
How do we define public static IP's, the example seems to show DHCP?In order to detect if a line is down, it has to ping an IP address that is specific to the connection - correct? So could I use the gateway for the ISP? The issue I have with this is the gateway might be up, but the Internet down. Next, we need to make sure that when someone visits one of our public IP addresses, the return data is sent through the connection requested. What we don't want is a situation where incoming connections are not working.From experience, load-balancing causes certain websites and SaaS applications to break because requests are coming from two different ISP's. Is this the case with OER? Finally, any links, config or something to advise how a fail over only configuration would work given we have internal servers (PAT/NAT inbound would need to translate properly with the failover IP)? Basically if ISP 1 goes down, I.E. router cannot ping 8.8.4.4 then it switches to ISP 2, until ISP 1 comes back online and switches back? This would need to change the NAT rules for inbound as described.
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Mar 9, 2013
I have one of my customer have cisco 2951 Router with two ISP and two ADSL module .i already configure one ADSL module.rit now customer want secondISP ( ADSL) module configuration separate netwok because customer have Access pont they want connect directly to router is it possible
1st ISP already running but customer requirement 2nd ISP superate network with Access pont not redundancy
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Aug 9, 2011
how to connect 2 routers that both have an ADSL connection. When attempting this the Belkin router will lose the ADSL connection after a random amount of time.
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Mar 28, 2011
We have purchased a Cisco 1921 with twin ADSL after advice from a Cisco sales rep. However I am having trouble working out the load balancing/fail over config for the device.
I would like traffic to balance over both ADSL lines and if one goes down not to interrupt connectivity.
I had a look at ppp multilink but I am unsure our ISP (BT) support this?
!! Last configuration change at 13:18:34 UTC Tue Mar 29 2011!version 15.0service timestamps debug datetime msecservice timestamps log datetime msecno service password-encryption!hostname xxxxxx
[Code]......
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Feb 19, 2012
We got a 1921 router that works fine. We ordered Verizon Businss One Static IP ADSL. It came with a Westell Modem that we configured in bridge mode. When we do a test by assigning a static IP to our laptop then hook it up to the Westell it works fine. We can browse the web. Then when we assign a static IP to the Ethernet on our 1921 then connect it to the Westell it doesn't work. We can't ping out from the router to for example 4.2.2.2. From the router we can't even ping the default gateway (on Verizon's side).
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Aug 22, 2012
I have the requirement to provide a Cisco Router with 3 x ADSL lines (768k) to increase the internet speed.PPP multilink is not supported from the ISP.
Is it possbile to distribute the traffic between this three ADSL lines?How can I configure this?
I have the following hardware configuration:
1 x CISCO1921-SEC/K9
2 x EHWIC-VA-DSL-B
The third ADSL line is connected over an ADSL modem at one fixed Router Gigabit interface.
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Feb 5, 2012
I would like to set up two separate networks from one internet connection(modem), with the goal being to have a public network(Network A) that would have a small server on it, and then having a second secured network(Network B) that would have my personal computers on it. And both networks having connection to the internet. (The idea being that if the server somehow became compromised that my personal computers and their data would be safe)I have done some research and found that many people claim this can be done with just two or three routers, but none of them go into any detail about how to configure the routers. Below are the physical setups of the two options that I have come up with in my research, which if either would you recommend? And how would I configure each of the routers?
--------------
Modem/router 1 (Network A public)
--Internet-in WAN port
--port 1 to WAN of router 2-------------l
--port 2 server
[code]...
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Nov 1, 2011
I'm setting up two separate 5510's at two seperate locations. The client wants two seperate SSL-VPN's; one for the HQ and one for the COLO location. They have a single domain for which I have added a-records to point to the corrosponding ASA's thusly: [code]
My questions is this: do i need to buy seperate certificates for each ASA/fqdn/IP combo? I'm using godaddy to buy the certs. If I do need to buy seperate certs, that makes the installation easier, but may waste $$. If I only need to buy one cert, how do I set it up so that both combo's are verified?
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Oct 3, 2012
I'm new at this stuff and very stumped. I have one WAP with multiple SSIDs that support VLAN ID (for a private and guest wireless network) and a managed switch that supports tag or port based VLAN ID. How do I set up the switch so that the networks are separate, but can still reach their own routers to get on the Internet? In case details are necessary, the WAP is a Cisco Aironet 1130AG and the switch is a Netgear FS750T2
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Jun 9, 2013
We have an ASA 5505. 5505 comes with two default vlans 1&2 with each of them marked as inside & outside respectively.My query is , if i do not want to use vlans on 5505 and only want to use the Ethernet ports as pure physical layer 3 ports, is it possible?i.e. i want to assign a layer 3 ip address on eth0/0 and eth0/1 and make them as the inside & outside interfaces rather than vlans. is it possible to do away with vlans in 5505 & will it work otherwise?
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Jun 13, 2012
I have a 4-port Netgear modem/router (DG834), and need to distribute its Internet connection according to the following criteria:
1.There are 11 access points (3 wired, 8 wireless) across 4 floors of a building - all cabling is from a central point, which will connect through a switch.Cat 5e cabling is in place.
2.The wireless points need Power over Ethernet connections
3.The 4 router ports serve 2 PC's and a printer in an office, the fourth being the connection to the switch.
4.There must be network separation so that:
- all points have Internet access
- there are three separate groups - one for the office, one for staff (wired) and one for guests (the wireless points), the purpose being to ensure that no user in one group can access any user's device in the other 2 groups. I'm assuming VLAN is the method for this.
5.Traffic on the network is likely to be fairly low casual use of the wireless ports, the office PC's only being used for Internet access and email no transactional systems, large databases or other resource / network-intensive functions.
1.Both the Netgear FS726TP and GS724TP look as if they will do what I want, using WNAP210 wireless access points. Could I achieve the same outcome with 2 x GS108PE switches? Any other hardware recommendations?
2.Do I need any additional hardware?
3.Are there any other considerations I have not thought of?
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Feb 4, 2013
I have a Cisco RV180-K9-NA router. I would like to set up 2 separate VLAN assigned to different ports on the router. I will be using LAN port #1 to communicate with the router. The NIC connecting the PC to the router has multiple IP addresses assigned to it so that I can communicate with the separate VPNs (192.168.1.x for the router; 172.16.10.x for VLAN #1 on port 2; and 182.16.10.x for VLAN #2 on port 3). I also need to be able to have the router provide both IPv4 and IPv6 DHCP services for devices on each subnet.
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Jan 19, 2013
We have a two separate businesses in the same building who will both need access to shared resources and the same internet connection. They will need to remain on separate subnets and cannot communicate directly to each other. The current switch is a Cisco ESW-520-48P and we are looking at purchasing an SG-300-20P for the new business moving in. Heres how we envisage setting it up:
ESW-520 will host Company A's network. Workstations, servers etcSG-300 will have two VLANS. VLAN1 will host all Company B's network. Workstations, servers etc. VLAN2 will host the shared resources such as printers. The internet gateway is a UNIX based system with 3 NICS. 2 NICS are taken up by ADSL connections while the other NIC is the LAN, which would connect to VLAN2 on the SG-300. We would like to define which ADSL connection to route through depending on which subnet traffic is originating. The ESW-520 will need access to the shared resources and internet gateway on VLAN2 on the SG-300.
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May 20, 2012
i'm having some trouble setting up the correct NAT configuration of a Cisco 1921 router. The NAT is not working as I want - I think my configuration is wrong somewhere. All clients in 172.16.0.0/24 have the correct outgoing address of 1.1.1.3. But the NAT for 10.10.0.4 (and 10.10.0.5, 10.10.0.6) is partially broken: Ping and ssh from the outside world to 1.1.1.4 is "natted" to 10.10.0.4 and works as expected. But from inside (172.16.0.0/24) ssh to 1.1.1.4 should be "natted" to 10.10.0.4, but doesn't work (ping works). ssh from 172.16.0.0/24 to 10.10.0.4 (without doing NAT) works.
network design:
===============
172.16.0.0/16: network for normal use
192.168.64.0/24: network for specific clients and servers
[Code].....
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Feb 2, 2012
I have to configure failover Active/Standby on my ASA 5510.I am wondering how i could do for the outside interface, i mean, actually the ASA1 outside interface is linked directly to our Internet router.So now if i have to add ASA2 connecting to that router i will need a switch between them.I have already a switch for DMZ & LAN.The thing is that i will have to allow 3 switchs ports to communicate with each others.
- 1 for ASA1--outside
- 1 for ASA2--outside
- 1 for Internet router
How could i isolate these 3 ports to make them communicate alone ? Should i use VLAN for that ?And if i use VLAN, will this require to make any change of configuration on my firewalls (ASA1 & ASA2) outside interface ?I am a bit lost with this, if i am correct i will not have to do some "vlan tagging" on the firewall itself ?
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Aug 14, 2011
i have a cisco 1921 router and it has ge0/0 (LAN) and ge(0/1) WAN. ge 0/0 is well connected and i can ping it and the LED light is on but ge 0/1 has failed to come up.Ge0/1 is connected to an IDU and has a public IP address. The LED light also does not light on ge 0/1.Where could the problem be?
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Jul 9, 2012
I have a modem/router at one end of my house, but the WiFi doesn't reach the other end of the house (where I have my other PC). If I bought a second modem/router and plugged it in next to my computer, would that work?and if so, would I have to turn one modem off to use the other?
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Jun 14, 2012
What is the Cisco 1921 router performance if connected with 2 Giga Ethernet port? What is the performance if enable GRE tunnel ?
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Oct 3, 2012
What are the commands for Configuring Cisco 1921 Route's Gigabit Port G0/0 or G0/1 for Leased Line termination having Ethernet Hands Off
Modem Provided by ISP (BSNL ) is CTR-U
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Jan 19, 2012
I have 1 x C2900 router with 3 x ADSL WIC and UC500. I setup 3 x ADSL to access internet and UC500 is connected with 3 telephone lines (plugged into FXO ports). I have 2 x GE on my 2900. 1st GE is connected to switch and 2nd GE is connected to UC500.
I want to setup that traffic from UC500 (SIP) is going through 1 dedicated ADSL line and data (from computers & servers) is going through remaining 2 interfaces only. How I can set it up.
I would also like to know how I can load balance internet connection going through 2 dedicated data ADSL lines.
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Jun 9, 2011
Using a small network (WAN) with three 1921 routers (IOS 15.1(T)) connected via E1 links. One host (industrial PC - core 2 due running Win XP Pro) connected to each router. The spare Gigabit Ethernet port on each router is bridged with the active one (so a portable management PC (laptop) can be plugged in there and communicate with the router and the industriual PC.
Multicast routing strategy between the routers is as per "Anycast - Static RP", with PIM sparse-mode enabled on all interfaces and sink RP defined on all three routers.
Problem occurs when a (IPV4) multicast application on one PC communicates with the others:
(a) IGMP V2 membersip reports etc. work correctly at the sender and at the other two PCs receiving the multicast stream
(b) Multicast routing on the WAN is working correctly; running Wireshark on the receiving PCs shows that multicast data is received on the expected group.
(c) But, there is an error in the Ethernet packets
i. The first packet's Ethernet header contains the correct destination MAC address 01:00:5E:aa:bb:cc where aa:bb:cc match with the last three octets of the mulicast group's address, and that packet is received OK by the listening multicast application
ii. However, subsequent packets' Ethernet headers have the wrong MAC address 01:00:5E:00:00:00 (the last three octets are all zeroes and these packets are discarded by Windows on the receiving PC and not seen by the multicast application.
Problem is related to the presence of integrated routing & bridging; if I delete the bridge virtual interface,disable bridging and give the two Gigabit Ethernet ports their own IP addresses, the multicast reception works correctly; all received multicast packets have te expected value on the destination MAC address (matching the group address)I have used the same integrated routing/bridging configuration successfully on Cisco 2611 and 2811 routers and there was no such issue with the multicast packets.Have I overlooked some subtle aspect of configuration in the 1921 router or have I uncovered a bug...?
For reference - snippets from router configuration scripts
:
In the non-working configuration (with Integrated Routing & Bridging)
interface GigabitEthernet0/0
no ip address
duplex auto
speed auto
[code]....
In the working configuration all the bridging is gone and the two Gigabit Ethernet interfaces have a very plain & simple configuration in different subnets
interface GigabitEthernet0/0
ip address 192.168.212.1 255.255.255.128
no ip directed-broadcast
ip pim sparse-mode
duplex auto
[code]....
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Nov 28, 2011
I have a cisco 1841 router in place. I also have a ADSL module which fits into the cisco router. My understanding is that if configured correctly, If the primary circuit were to fail (Ethernet Circuit MPLS), the ADSL would take over services until such time the ethernet link becomes available.
Therefore the ADSL circuit is used as a resilient link. If this is possible, can the Cisco 1841 be setup to automatically switch over to the ADSL? Would there be some sort of heart beat between the ethernet circuit and adsl circuit?Also from the other end of the Cisco router, the connection goes into a firewall. If the Cisco handles the failover, I assume I would not need to configure anything on the firewall.
The end users beyond the firewall, should be able to continue, however the performace would be degraded?
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Apr 24, 2012
I have cisco 1801W . Earlier I am using ADSL dynamic IP address on RJ 11 through the ADSL Port but now the ISP change the connection to RJ45.
I am trying to configure it but unable to do this. ADSL line is okay because When I am connecting through the ISP router it is working fine. I have connected the ADSL RJ45 cable in the router fast ethernet 0.But I wanted to use Cisco 1801 Router so that I can use the ADSL as primary and ISDN as the backup.
Below is my configuration, eiteher this is possible to configure ADSL through RJ45 in 1801 and what configuration require for this.
Router#show ip int brief
Interface IP-Address OK? Method Status Protocol
FastEthernet0 unassigned YES DHCP up up
BRI0 unassigned YES unset administratively down down
BRI0:1 unassigned YES unset administratively down down
BRI0:2 unassigned YES unset administratively down down
[code].....
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Jan 2, 2013
Region : Malaysia
Model : TD-W8968
Hardware Version : V1
Firmware Version :
ISP : Streamyx
In the process of Lan setting my new wireless adsl modem router TD-W8968, an error message shown when I press save. Error Code: 1, Internal error.
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Jan 22, 2013
At home I have a D Link DSL-2640R wireless adsl router/modem in my downstairs office.I would like to use the cable which goes to upstairs of the house to link to some sort of extra router or switch in order to provide more network ports upstairs.
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Dec 2, 2012
I have this adsl wireless router but my internet connection only has RJ45 directly connected to my PC. My questions is how can I use my ADSL wireless router with this kind of internet connection.. because I really want to make my connection wireless..
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Mar 14, 2011
how do you set up an ethernet port for DHCP with a Belkin ADSl modem with wireless G router, model number F5D7632-4?
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Oct 5, 2012
We want to puchase new Cisco ISR 1921/K9 . i want to know does it support the following sample IP-SLA commands
ip sla 2icmp-echo 172.16.1.2timeout 500frequency 1ip sla schedule 2 life forever start-time now
track 10 rtr 1 reachability
delay down 1 up 1
!
track 20 rtr 2 reachability
delay down 1 up 1
ip route 0.0.0.0 0.0.0.0 192.168.1.2 track 10ip route 0.0.0.0 0.0.0.0 172.16.1.2 track 20
Im asking above question because we will need to enable ip-sla on the mentioned router. as i read on the cisco webside, it says Cisco-ISR-1921/K9-IP Base support only IP-SLA RESPONDER feature nothing else. If Cisco-921/K9 does not support the above commands , should i go for ordering Cisco-1921-SEC/K9 ?
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May 1, 2013
I have a Cisco 1841 that has an ADSL (ATM) card installed. It was previously used with an ADSL line to provide NAT routing for an office. Now I want to use it witha cable modem, which would mean abandoning the ADSL interface and instead routing between the two Ethernet ports.Between the Cisco and the LAN is a Linux transparent proxy. It provides routing between 192.168.1.0 (LAN) and 192.168.2.111 (Cisco LAN interface). The network looks like this:
Cable Modem(174.76.21.1)(gateway) --- (174.76.21.10)(WAN) Cisco 1841 (LAN)(192.168.2.111) --- (192.168.2.11) Linux Proxy (192.168.1.10) --- (192.168.1.0) LAN
For testing and diagnostics, I've connected a laptop to each FastEthernet port on the router. One laptop is configured with the IP 174.76.21.1 to simulate the cable modem gateway and the other laptop has the IP 192.168.2.11 to simulate the Linux proxy. From those systems I've performed the following diagnostics with the following results:
From 192.168.2.11
Ping 192.168.2.111 - OK
Ping 174.76.21.15 - OK
Ping 174.76.21.1 - Timed out
From 174.76.21.1
Ping 174.76.21.15 - OK
NAT translation to LAN IP's failing
There are some vestiges of the ADSL configuration, but I've cleaned most of it out and shut down the ATM interfaces. Here's my config:
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
[code].....
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May 7, 2012
i would like to "team" two ethernet ports on a 2921 router into a single redundant link to a switch, similar to how an HP server teams multiple NICs to a single IP address. is port-channeling the best/only way to do this? i don't necessarily need the two links to be load balanced or bonded, considering the serial side of this router is just a single T1. i just want the links redundant, so in case something goes wrong with one cable or switchport, traffic will go over the other link.
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Mar 6, 2013
how the ASR1000s are being setup.I am looking at ASR1000s as part of network refresh and was looking at RJ-45 based Gigabit Ethernet ports compatible with the ASR1000s SPA-5X1GE-V2 seems to be an option but they are all SFPs. Are there any options for RJ-45 ones on ASR1000s?
There is an option for the 2 port where one can mix and match SFPs and RJ45 but I was looking for something which is RJ45 only.Are there any options for them available.I know I could get something with FastEthernet type but was looking for the GigabitEthernet type.
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Nov 15, 2011
When i was looking for a wireless card, everyone seemed to be having connectivity issues with all of these cards, and i regularly have interference issues when the microwave is used which completely knocks off my connection. How to connect a second router as i have a telephone port in my room so i am able to connect my PC/PS3 via ethernet. Just some basic info, I'm on the O2 wireless network using their Thomson router, and i also have a Bt Homehub 2 lying about for some reason.
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May 31, 2011
my house has 4 ports in each room, 2 coaxial, 1 for the net, and one for a TV, and there's a phone jack and a Cat5e Ethernet port. From what I have learned, all my ports lead up to a "closet", and I have found it. It has all the connections for the LAN, and everything else. I am confused on what to do next. I see that there are blue Ethernet cords connected to the ports on one side, and that they are not connected to anything on the other. I thought I had to buy a switch for all these ports, and I haven't done so yet. where am I supposed to connect the modem to the internet. It is currently connected to the internet coaxial port, which it then connect to the VoIP switch, and is then connected to everything else. Where is the coaxial port that I have to plug it in to, and what is it labeled?.
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