Cisco WAN :: Configure Backup Links On 2800?
Oct 16, 2011
I currently admin a WAN link between two international sites. I have a 2800 at each end. The primary connection between the two sites is 20MB Ethernet PIP MPLS BGP circuit. I also have a pair of T1's in a PPP multilink that I switch over to in the event the primary circuit goes down. I currently am doing the switch over manually. It takes me about 15 minutes to complete it, but I know there must be a way to make this an automatic process.
So a couple questions:
1) Is there a way to create an "enhanced multilink" with the 2 T1's and the Ethernet circuit in the same bundle, in effect giving me 23MBps bandwidth while still being able to maintain connectivity if one of the 3 links goes down? This is my preferred solution
and if 1 is not possible then
2) Is there a way to configure the router so if the Ethernet circuit goes down, all traffic will be automatically directed over the T1's, and then come back to the Ethernet when it's back online?
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Jan 31, 2012
In a site we currently have 1 BT provided ADSL link which is currently terminated using their device which I believe is some kind of 2wire device, which is extremely slow due to distance from the Exchange (4Mbps)...We have a growing number of users here and want to install a second ADSL line from BT to give them increased performance.
We have a Cisco 2800 sat not doing much so I was wondering if I could use this to load balance the link? I know BT do not support MPPP so therefore the maximum any user can get will be the speed of a single link (4Mbps)...But basically how can this be done..
Can I leave the two BT routers in place and place the Cisco 2800 behind them, or do I need to purchase two ADSL modules for the 2800 and terminate the connection there?Also once done, what do I need to do regarding actually setting up the load balancing? I have seen this:
[URL]
But am unsure as to how relevant it is? I am not sure I understand what the ACL's are being used for? I just want all users on the LAN to load balance out...
Also I am unsure of this statement:You potentially need to add policy-based routing for specific traffic to ensure that it always uses one ISP connection. Examples of traffic that require this behavior include IPSec VPN clients, VoIP handsets, and any other traffic that use only one of the ISP-connection options to prefer the same IP address, higher speed, or lower latency on the connection.I do not understand why a established session such as a VPN client, would ever traverse the second ISP connection anyway?
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Sep 13, 2011
I need to implement the backup between two sites I have router 2800 which is having a point to point connectivity with the far end.At the far end there is no router ,only one firewall is there on that firewall one access-list is there to allow the traffic .To implement the back up link i have created a site to site vpn .But the problem is as soon as the tunnel is establised .For the time being i have removed by site to site config from both firewall.
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May 3, 2011
We have a few WAN connecting sites to ISP using BGP. we are looking at getting backup link for 1 site.
We have decide to use an IP WAN ADS L link. we will have 877 and 2800 for each link. from understanding, we have a static routing on IPWAN service. means when both BGP WAN and IP WAN connected to the ISP. ISP will use ADSL as primary ignore the BGP link. so other sites will see a BGP route coming from ISP via the ADSL link for this location.
So we have find a manuel solution, leave ADSL unplugged of power but setup same LAN ip address and connect the cable towards the core switch. when WAN link fail, switch on ADSL. So the static route will advertise to the rest of sites.
just want to know is there any auto solution can disable the ADSL link/ ppp link when the 2800/WAN route is up. and enable the ADSL port when the WAN is down. not sure if HSRP/backup interface/tracking will work? and how?
site office switch - > 2800 - > ISP - > ADSL -> ISP
(need this link to be backup and protocol down, so the ISP will not able to connect to this link and advertise as next hop)
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Aug 1, 2011
Site A, site B, site C, site D is connected using leased line each other. We are using Cisco 1800, 2800 and 2900. Each site also have Internet connection using ADSL connected to firewall, we are using pix 501 and ASA 5510.My question is, can i use the existing ADSL line to be use as a backup line if the leased line is down on any of the site??And i want it to trigger itself, once the leased line is down, the firewall UP the backup line? something like that..
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Jan 29, 2012
I was configuring route tracking at a client with several sites to route across GRE tunnels and being able to detect a failure of the main site. To my surprise when configuring a 2800 series router (after sucessfully configuring a 1800 series on the same infrastructure), a 2821 with IOS 12.4(24)T2 IPbase, the commands for ip sla object tracking don't show up.The feature navigator says the router supports this, but it just won't take the commands (also tried older versions of the commands such as "ip sla monitor.." and "rtr .." to no avail).
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Oct 7, 2012
I have Cisco 2800 series router. When I am trying to write memory getting error message " Error opening flash:config-backup-1 (No more root directory entries available)" When there is simultaneous access to a router's NVRAM, we might encounter these errors. In order to clear the line the other user(s) is (are) connected on and free the NVRAM, issue the clear line command. But still getting the same error message.
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Sep 19, 2012
I need to configure two links (active and failover) on router 2911. Do I need DATA LICENSE to configure this with static router and route-map?
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Jan 13, 2011
I am using Cisco Router 2800 series. How to block url and also how to remove block url
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Feb 18, 2013
I have two stacks 3750X on two different sites with two links L_2_L, and I want to configure the port channel to aggregate the two links.
Site A Site B
3750X -A1 --------------------------------------( )--------------------------------------- 3750X -B1
( L-2-L )
3750X -A2 --------------------------------------( )--------------------------------------- 3750X -B2
Below the configuration that I have put the two stacks.
site A
interface Port-channel5
description Etherchannel group entre le stack 3750X-A et Switch Lan_2_Lan
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 11,12,999
switchport mode trunk
switchport nonegotiate
speed 100
But the problem is only one link is Bundeled in channel group, see below
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
5 Po5(SU) LACP Gi1/0/15(I) Gi2/0/15(P)
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Jul 8, 2011
I have a 2811 router that I want to configure the F/E 0/0 & 0/1 to be able to communicate.FE 0/0 is configured with 192.168.16.1/24.FE 0/1 is configured with 10.10.10.10/24 Physically attached to this port is going to be a wireless router configured with 10.10.10.1.My question is how to configure and setup the routes properly and do I need to configure NAT and Access Lists.
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Mar 12, 2013
How do you configure a external FTP Server for Cisco NCS 1.1? I only get setup username/password, i also need to setup FTP server IP and directory.
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Jun 23, 2011
I have one problem regarding a configuration (or setting up) of 3G SIM card for 887G router backup. That SIM card had a PIN code, so I disabled it, and now I can see that 3G light flashes Blue, so it detects 3G network. Also I can see that modem tries to dial up to connect to network, but with no luck. It has CHAP APN. Also in configuration I've found that there is PPP CHAP username and password, but I don't have any of those. I've tried to configure my SIM card with Username and Password, but it doesn't save. At the moment I have: Cellular 0 is down, line protocol is down. Dialer 2 is up (spoofing), line protocol is up (spoofing).
SIM card status is OK. Network detects O2 - IRL - yes.
It detects the network, but cannot connect to it. I'm not sure how to setup the SIM card or how to unlock it.
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Apr 17, 2012
how to configure the 2nd WAN port to support 4G/LTE connectivity that will serve as the backup circuit to the primary MPLS circuit?
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May 15, 2012
We have 6 sites which are connected through E1 links.All sites connected from HQs.
Site A is HQs.
Sited B, C, D, E, and F are Branches.
Site A is directly connected with site B, C, D and E.
Site D is connected with Site F.
Now we have another redundant E1 link for site C and Site F.we are using Static Routes.i have configured Qualified-next-hope on Juniper Router but i am unable to configure IP SLA on Site C Cisco 2951 with IOS 15.0 router.is there another solution for my scenario plz share with me for Redundant Link.
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Oct 10, 2012
we have a AP cisco AIR-AP1131G-E-K9 Version 12.4(10b)JA, and we would like to do automatic backup of CLI configuration to one server, and we dont know how to do.
For example: On router and switch we use this kind of configuration to do automatic backup: [code]
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Jul 11, 2012
I've got a 881 working with a 3G Card. Even the Cisco 7965 phone is working well off it. Looking for good doc for configuring the 3G interface as a backup link to Comcast?
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Apr 22, 2012
I have two SG300 serie switches and two Gigabit connection between them. How do I configured these two links to work toghether like a one 2 Gigabit channel?
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Jan 18, 2011
I have two 3750 switch.switch A(main) and switch B is connected by OFC but i have another wireless link for backup.Now if OFC goes down then i manually connect wireless link with switch B for this reasons i am faceing a lot of problem. I want without any changing of cable if my primary link goes down then my backup link automaticaly goes up and vice versa .
Switch-A port gi1/0/9 and Switch-B port gi1/0/9 is connect by OFC Switch-A port gi1/0/8 and Switch-B port gi1/0/8 is connect by Wireless link (backup) i attach my network diagram kindly find the attachment file.
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Sep 24, 2012
I'm looking for some documentation I can share with a customer to explain why I can't configure them a back-up sticky server farm when we're not terminating SSL on the the ACE (we pass SSL from the client through to the rservers, sticking the client to the rserver by source IP address). I've not been able to find anything that addresses this particular scenario in my googling so far. I remember discussing this in my training class with the instructor, but I can't find any reference to it. Have any of you run into this and have a link they can share?
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Jul 24, 2012
how to configure a backup route to the internet. My client has 2 ISP and basically they want to use 1 ISP and in case the ISP fails, use the other one as backup route to the internet.
The problem I’m facing is that each ISP is plugged to a dedicated ASA 5510, so 1 ISP in one firewall and 1 in the other. Both ASA are plugged to an internal network in a dedicated VLAN with a L3 switch and that L3 switch manages the internal network.
My question is, how can I tell my switch to use ASA1 to go out to the internet and in case the ASA 1 OR THE LINK TO INTERNET used by ASA 1 fails, use ASA 2? It would be great if I can send traffic to the internet thru both connections at the same time. Also, I know the ASA has High Availability configuration, but that applies only if both licenses in the devices are the same and I have a mismatch with the SVPN license, and also I don't know if with my current topology I can use the High Availability model, so I think I can’t use that option and the solution must be applied in the L3 switch, but I don’t know how to tell it to use ASA1 and if failure of the device or the outside interface plugged to ISP 1, then use ASA2. Besides, I would like to know how to optimize this config to do the switch between internet connections seamless to the users if possible (there are VoIP calls on this floor, so I don't want to drop the calls).
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Oct 16, 2011
I have a asa 5520 with an outside and backup interface. I am trying to configure two static nat statements from the inside to the outside and backup interface. Here is what I have configured so far.
object network obj-10.1.1.254
host 10.1.1.254
object network obj-10.1.1.254
nat (inside,outside) static 172.25.10.3
I want to also use nat (inside,backup) static 172.25.10.3
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Apr 16, 2013
I thought I saw a post/question in regards to "how to" configure a Broadband backup for a MPLS circuit.. What I am trying to do is use a cable/dsl/ broadband (secondary) connection as a backup to a MPLS circuit (primary). I have EIGRP and BGP configured on both the branch endpoint and the tunnel headend. The tunnel is used by the interface that connects to the secondary circuit. The branch location router is a 1841 and the "headend" tunnel router is a 3825. I am wondering about the configuration/syntax of a "weight" or static route that can be used to have data flow over the tunnel when the MPLS circuit goes down - and then switch back to the MPLS circuit when it comes back on line.
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Sep 16, 2012
I'm trying to configure scp for secure configuration backup. I've configured the SCP server with an account and password but, I keep getting the no such file or directory error
AP-C2R1C5-3750#sh run | b arch archive path scp://mchenry:PASSWORD@172.20.22.229//C:/Program_Files/OpenSSH/Cisco_Configs/Switch_Config
username mchenry privilege 15 password 7 XXXXXXXXXXXXXXXXXXXXX
ip scp server enable
Error: %scp: /C:/Program_Files/OpenSSH/Cisco_Configs/Switch_ConfigSep-17-16-04-44.172-1: No such file or di
SWITCH#ping 172.20.22.229 Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 172.20.22.229, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 33/33/34 ms
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Sep 18, 2012
The layer 2 switches are connected to layer 3 Switch via trunks, and routing between layer 2 switch ports with configured SVI's on 3550. All working fine. Now I'm trying to configure routing between 2800 and 3550, I tried connecting both Straight Throught and Crossover cables to the 2800 Fa0/0 and Fa0/1 ports as well as the switchports on 3550
No switchport commands are configured however, the lights do not go on for both straight through or crossover cables. I tried connecting 1750 routers but same result. My goal is to have all the VLANS routed to the internet with configuring NAT translation the router.
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Feb 6, 2013
I have configured four E1 links between two locations on my 3745 using WIC-2T cards. At both ends all the serial links are configured as ip unnunmbered fastethernet 0/0 encapsulation ppp OSPF is enabled without CEF I would like to know how load balancing will occur in this scenario?Will all my links be utilised at the same time? Will multiple links be used only when the need (in terms of bandwidth) arises?
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Jul 13, 2012
I will be configuring all the MEC links on my 6500 VSS chassis tomorrow morning and one thing I am a bit confused about.According to the best practices guide they suggest you configure all etherchannels trunks to be in desirable mode. All the trunks are using LACP active - active right now but that's only to one chassis.Should I change all my MEC etherchannel trunks to desirable mode or just leave them active-active?
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Jan 31, 2013
I have a customer with a unique configuration. They have two point to point connections - one using a laser link between buildings, and a backup fiber connection running ospf. Issue is when the laser link goes down, there is loss/no forwarding during the reconvergence, causing issues with transffering video feeds.
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Dec 20, 2012
I got a Cisco 870 router. running C870-ADVSECURITYK9-M), Version 12.4(15)T7, does this support two link from different ISP.
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Apr 18, 2011
I purchased a Cisco 520 and am trying to set it up on my home network.Its ADSL PPPoA for WAN.I am trying to setup 2 LANS. One General Network,One DMZ for webhosting.Now, since this router has 4 ethernet ports, i assumed i did not need VLANS. Except when i try configure an interface with an IP address i get this error: % IP addresses may not be configured on L2 links.Now. Ive looked around on the internet about this error. And it seems that since these interfaces are not Layer 3 interfaces,they need to be associated with VLANS.This would be OK. Except this requires an IP address on an interface on the router! Back to square one.
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Mar 12, 2012
The regular problem with the LMS topology and WAN Links when you see the branches are disconnected from the HQ BUT in my case the branches are already connected via Layer2 links but unfortunately some intermediate layer2 modem/switch exist in some branches which prevent CDP discovery but you will find both HQ and branch router in the same subnet .
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Apr 29, 2013
We have a 3845 router at one of our remote sites. We want to connect the router to our central office using the two gigabit ports. One link would be the primary and the other would be the secondary (backup).
The router is running EIGRP and the two ports would have different ip addresses. How can we set up the router to use gi0/0 as the primary port and gi0/1 as the secondary (backup) port? The backup port would only be used if there was congestion on the primary port or if the primary port went down. Is there a way to force the router to make the primary link the best route?
Remote Router Sample Config:!
int gi0/0
desc primary link to Central Office
ip addr 10.0.1.84 255.255.255.0
[code]....
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Nov 3, 2011
I have two Internet links:ISP1: only Site 2 Site VPNsISP2: only HTTP/HTTPS traffic and incoming remote access VPNs With the security plus license I could correctly configure them both as active at the same time on the same ASA device. Also, I've successfully accomplished the following traffic separation:
Site to Site VPNs goes out through ISP1HTTP/HTTPS traffic goes out through ISP2 The customer request is that, when ISP1 fails the S2S traffic is relayed through ISP2 -> This is working fine, I've already tested!But when ISP1's service is restored and that link is working fine, I want that the S2S VPN traffic gets relayed through it again automatically, which didn't happen. My question is: using SLA will the S2S traffic be relayed through ISP1 again automatically when it's services are restored? If not, which technology should I use to accomplish this?
PS: This is all configured on only 1 ASA 5505 whose license was upgraded.
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