Cisco WAN :: 2811 Non-stacked Dual Switch Failover

Jun 6, 2012

I'm trying to see if I can use both ethernet ports on a 2811 to run hsrp for non-stacked dual switch fail over.  Then link the the NM-32A ports to L0, so the remote access server trying to use them can use the l0 ip and failover much faster (it's programming is limited).  This is on IOS 12.4(25)f, though we are moving to 15 soon.

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Cisco Switches :: Dual Stacked Series 500 Switch?

May 10, 2012

I am about to buy 2x Series 500 switches but before that I have a design to be sure :I want to create a redondant network so it is the reason why I want to stack 2x Series 500 switches.Each server on my network (ESX and Windows 2008) are connected with two NIC (one port on the first switch , one port on the second switch), with trunk mode + etherchannel for LACP.
 
First question : I saw that the limitation is up to 8 etherchanel groups, can I have a mix of multiple servers on the same etherchannel group or should I create one etherchanel group for one server with only the two NIC inside?
 
Second question:I want to use the series 500 to do intervlan routing and want to be sure that if the the ports are in trunk mode with some vlan set on the card itself that the default gateway for the vlan will be propagated on the two switches (in stack mode) and will not cause any issues when both switchs works fine and if one switch crashes?

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Cisco Switching/Routing :: 3750-x / Licensing On Stacked Switch?

Jul 16, 2012

We have two 3750-x stacked switches with IP base license. We need to upgrade them to IP services license. I read some where that it is possible to install IP serivces license to only management switch and no need to purchase/install same license to other switches on the stack. But, I could not find/recall where I read it and as far as I know it was not official cisco documentation.  

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Cisco WAN :: 2811 / VPN With Failover Option?

Feb 7, 2012

In one of our regional office I want to terminate 2 Internet links on a single  2811 Router and use both the links as primary and backup to enable site to site VPN. This also gives redundancy option if primary link fails. The Router has total 3 FE ports.
 
Current setup is terminating one internet link only on the router and establish site to site VPN to our HQ

ISP_Router--------------ASA_Firewall---------------------L3_sw_3560--------------------users

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Cisco WAN :: 2811 Configuration Of BGP For Two ISPs For Link Failover

Nov 1, 2011

does cisco 2811 support?if no, can i make it work for BGP?also, i want to know the configuration of bGP for twoo ISPs for link failover.it will be google if u tell me step by step approach for configuring it

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Cisco WAN :: 881g Dual NAT Failover Not Working

Mar 24, 2011

Below is the config has done on my 881g but the dual NAT failover is not working.I have a easy vpn over NAT (easy vpn firewall: 10.10.10.2 behind the router).
 
1. After completed the config, I shut down the FastEthernet4, cleared the nat translations, found that nat translations are happening on to Cellular0 with error ( Incomplete ESP translations: 0 esp_conn=0x85A91FF0, hanging off nat entry 0x85A7D1D0)But still the easy vpn is not up as I am not able to ping the remote devices.

2. If I reboot the router then the nat translations are happening with no above error and easy vpn is up and I am able to ping the remote servers. Below is the config, what needs to be done to achieve the NAT failover and easy VPN up.
 
interface FastEthernet4 bandwidth 2048 ip address 206.206.206.2 255.255.255.240 ip flow ingress ip nat outside ip virtual-reassembly duplex auto speed auto interface Cellular0 ip address negotiated ip nat outside ip virtual-reassembly encapsulation ppp dialer in-band dialer string gsm dialer-group 1 async mode interactive ppp chap hostname. [code]

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Cisco WAN :: Dual ISP Failover Configuration 891W?

Apr 18, 2012

What I currently have is a Cisco 891W Router as well as two ISP's (both with dynamic IP's) in.  I'm currently just running one of my modems into the 891 through the FE8 port and then if for some reason I have an internet failure switching the ISP modems.  What I'm wondering is if there is a fairly simple way to configure (and attach) both modems to this router and then set it up to handle this failover automatically?

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Cisco WAN :: 3845 Dual ISP Hardware Failover

Feb 27, 2011

In my network we have 2 ISPs connections 2mbps from different service providers are terminated in two different routers (Cisco 3845).Now i want to achive if one router fails(ISP down) next router has to up and if both the links is up i need to achive load balance for both the routers(ISPS).i need 100% uptime.
 
How can I configure the routers, any examples to achieve the HW failover.

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Cisco WAN :: 1941 - Dual WAN Failover And Partial Failure

May 10, 2011

We had an interesting situation after an electrical storm moved through where a few of our dual WAN clients didn't have any Internet connectivity.  Generally speaking, they are on a wireless broadband and something like DSL/cable/T1.  One customer in particular has a cisco 1941 router setup for dual WAN which tested fine during install (pull either connection, external IP changes dynamically and no difference is noticed by user).  Well, this storm knocked the wireless broadband out enough that it wasn't usable, but would respond to pings randomly.  Because the wireless is the fastest of the two connections it has a higher priority but because it was down but still responded to some pings, the traffic didn't go through the DSL that didn't go down.  how to make the dual WAN more reliable in these partial-down situations?  I thought about playing with the network service detection (we have a customer on an RV042 who experienced the same problem) but am not real sure what I could change that would make the connection more reliable, especially on the 1941 router.

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Cisco VPN :: 6513 / 7206 - Dual ISP Failover With Two ASAs That Are Not HA

Dec 4, 2012

I am having a hard time getting tunnel fail over working.  My setup is illustrated below:
 
I derive my default route on the border routers.  The 6513 peers with the 7206's using BGP to get the default route from each ISP into the core.   On the core I use BGP weighting to get my primary default to point to ISP1.  So far so good.  When I look at my core I see to defaults with ISP1 preferred.
 
Each ASA has an IP Sec tunnel to the head end site configured (Not shown).  The head end site has a crypto map entry with ISP1 and ISP2 defined (in that order) using the "set peer" command.
 
Fail over works great if an ISP drops the connection or my 7206 or ASA fails, but... While testing fail over I had an issue where both tunnels would be active and there were issues with traffic between sites. I could not determine the root cause.  I can only guess that some traffic was going out one tunnel and when trying to come back across the other tunnel was dropped from the firewall because there was no connection built for it.  After reading I found that in order to use multiple peers in the "set peer" statement, I needed to configure my head end as "originate-only".  I have not done this yet as I have concerns.  If the head end site is "originate-only" and the tunnel, for whatever reason drops, I cannot wait for interesting traffic at the head end site bound for this site to bring up the tunnel as most of the traffic originates at this site.
 
I have been reading about IKE keep alives and DPD but that doesn't sound like it will re-initiate the tunnel.  Is this correct? If so I'm looking for a way to make this work. 

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Cisco WAN :: 1921 Dual Links Failover And Fail Back

Sep 19, 2012

I have a 1921 router with two wan interface configured, one is primary and the other is standby or backup in case the primary goes down, I was able to configure links to failover from primary to backup once there primary is down, but how do I configure to make sure when primary is up it failbak to to it. [code]

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Cisco Firewall :: ASA 5500 WAN Failover MPLS / Internet Using Dual ASA

Jun 1, 2011

I am putting together a solution for a client. The client has an MPLS circuit and internet as a backup circuit. I understand that we can do WAN failover using ASA5510 appliance.Now, if i am adding dual ASA5510 active/standby mode, How do i automatically failover WAN circuits to standby firewall if both MPLS and Internet circuits are connecting to primary ASA5510. Should i connect MPLS circuit to ASA1 and Internet circuit to ASA2? Ideally, i want both circuits to connect to primary ASA5510 for automatic WAN failover. My concern is , if the primary ASA5510 fails which has WAN and Internet circuits connected , do i need to manually switch connection from primary to standy? The goal is to fully automate wan failover and asa failover .

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Cisco WAN :: 1921 Dual ADSL Load Balancing / Failover?

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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Cisco Switching/Routing :: How To Do Dual ISP Configuration - 2811 Router

Dec 9, 2011

Will 2811 Router with 4 switch port module, How to do dual ISP configuration on this router.

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Cisco WAN :: 2811 Router Model Selection For Dual Uplink Environment

May 3, 2012

My company has a single 2811 WAN router with dual uplilnks to different ISPs right now. Recently we have had a major hardware failure issue that resulted in network outage. My manager reconsidered my recommendation of dual WAN routers but told me we had limited budget so could only afford one new router.
 
So now we are looking at solution of 2811 + 2911 with same license level. We don't have any special feature, just basic routing, basic BGP and static routes. I need to know what the implication of having different WAN router model is.

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Cisco Switching/Routing :: 6509 SUP720-3B / Dual Link With Failover And Redundant Configuration?

Feb 24, 2013

I have a two fiber connection from our Central Office(6513) to Remote office (6509). I have a requirement that on the remote office if one of the fiber goes down, the second fiber should work as a failover. I am planning to use SUP720-3B SFP to connect to the CO.

Can I connet one fiber to Sup720-3b G5/1 & another fiber connection to G5/2?  or Can I connet one fiber to Sup720-3b G5/1 & another fiber connection to G6/2? I am running EIGRP between sites. Any sample config.
 
sup-bootflash:s72033-pk9sv-mz.122-18.SXD7b.bin"

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Cisco Firewall :: ASA5520 - Active / Active Failover In Multiple Security Contexts With Dual ISP?

Jun 1, 2011

I have an ASA5520 in location A with an ISP connection and a matching ASA5520 in location B with a separate ISP connection. We have fiber connecting the two locations and vlans passing back and forth so I will be able to configure the failover via a vlan as well as extend the ISP's to each location via vlans. The Active/Active configuration with the multiple security contexts does not seem to be an issue but how is a redundant ISP configured in this mode?We want to have context A using the ASA in location A with ISP1 as the primary and failing over to ISP 2 in locaiton B We also want to have context B using the ASA in location B with ISP 2 as the primary and failing over to ISP1 in location A Would route tracking provide the desired result? Is there a better option?

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Cisco :: Auto Failover Of Core Switch With Other Route

Apr 18, 2013

I want my core switch auto failover to other route if the primary route is link down it will go to the secondary route

example
ip route 0.0.0.0 0.0.0.0 1.1.1.1
ip route 0.0.0.0 0.0.0.0 2.2.2.2 100

if my core switch detect next-hop 1.1.1.1 it will re-route and go to the 2.2.2.2 for the next-hop my core switch using static route and cant support ip sla

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Cisco WAN :: 2811 - Routing The Switch Ports

Mar 10, 2011

I have a 2811 router with a 9 port switch module and a four port ISDN module.  The ISDN Module is our connection to the outside world.  FE 0/0 and FE 0/1 are connected to separate networks and both route our the ISDN connections.We are getting a new satcom system that consists of a modem, antenna control unit (ACU), and an antenna.  The ACU and the modem communicate accross Ethernet and are generally hooked to a switch.  Anything computer hooked to the switch can simply use the modem IP as it's gateway and be surfing the Internet without much hassle (just need the correct DNS addresses).I'd like the networks behind FE 0/0 and FE 0/1 to be able to route out the satellite modem for their Internet connection -- when the satellite is available.  Is it possible to put two switch ports in a VLAN (one for the modem and one for the ACU), give the VLAN an IP in the same subnet as the modem and ACU, and then tell the router to route traffic out the modem IP address ?

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Cisco WAN :: Set Up QoS Between 2811 Router And 3750g Switch?

Feb 14, 2011

I'm trying to set up QoS between a 2811 router and a 3750g switch.  I'm currently using the 3750 as the router for one side, having the interface connecting to the router as a routed interface. 
  
I have this config on the router side:
  
 class-map match-any IPTel-Traffic-CL
match ip dscp ef
match ip precedence 5

[Code]......

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Cisco Firewall :: ASA 5510 Switch Failover License From Old To New Device

Nov 1, 2011

I used to have this situation where I need to replace faulty ASA5510 (this FW did not failover to standby FW) with the new one.
 
But the problem is the new ASA5510 came with Base License only not with Security Plus License which is needed to allow this brand new device to be configure failover.
 
how do I pull out Security Plus License from old FW and switch it to new FW (Base License) and activate to Security Plus License.

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Cisco WAN :: 2811 Access Point And Switch Is Not Connecting

Aug 22, 2011

I have a Cisco 2811 router with C288nm-advsecuruityk9-mz.151-4-4.M.bin IOS version.The router has two LAN interface FE 0/0 and FE 0/1.The router have too, two interfaces ADSL ATM0.0.0 and ATM 0.0.1, both are connect to internet..I need the next configuration.The interface FE 0/0 is directly connect to a Switch A.The interface FE 0/1 is directly connect to a Access Point Cisco.The Access Point and the Switch is not connecting between.The subnet of Switch A and AP are different (Switch A 192.168.180.0/24 and AP 192.168.181.0/24)The devices in the switch A have dynamic IP address, the router must be a DHCP pool to assign theses IP.The device in the AP have dynamic IP address, the router must be a DHCP pool to assign theses IP.I created two DHCP pools in the router, one for the subnet 192.168.180.0 and other for 192.168.181.0, but the devices of FE 0/0 assign IP of 192.168.180.0 or 192.168.181. 0, but not only in the 192.168.180.0.

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Cisco Switching/Routing :: ISP HSRP With ASA 5510 Failover And Switch Selection?

Feb 27, 2013

I have two Cisco ASA 5510s that I would like to configure in an active passive failover setup.  The ASAs  are at the top of our rack and handle all our routing.  We have been  only using one ASA unit with one line from our ISP connected to the WAN/outside interface of the ASA.  We recently had our ISP setup two lines into our rack using HSRP.  I do not know what equipment they are running upstream of our ASAs but it is HSRP so it should be a set of Cisco routers/switches.  Originally I thought I could just connect the 2nd new line to our 2nd ASAs WAN/outside port and setup failover using a crossover cable between the ASAs.  After doing this config I had problems accessing some of our IPs in the subnet that the HSRP is part of.  If I disconnected the 2nd ASAs  WAN/outside line everything was fine.  After talking with my ISP they  explained that I need to connect both of my lines into our L2 network  and then from there into the ASAs. Currently below the ASAs I have two Catalyst 3560-X switches.  They are connected together with an ISL trunk and ASA-1s inside network connects to switch-1 and ASA-2 to switch-2.  One idea was to connect each of the HSRP  lines to each of my current switches and then from the switches to the  ASA's WAN/outside interface.  Finally back down from the ASA's to the  switches via the inside interface that we have currently.  This kind of  seems messy and a poor choice.  The other idea is to get two switches that would sit above the ASAs and connect the HSRP lines to them with the switches connected together.  They would then connect to the ASAs.  I like this idea better but I don't like having to buy two more full switches for this.  These switches would only use a couple of ports and only handle just the HSRP ISP lines to the ASAs.  Putting in two more 3560-Xs  would be a big waste of money and space for this.  So I was thinking of  using two Cisco SG200-08, 8 port gigabit basic managed switches for  this. 

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Cisco Switching/Routing :: Nexus 5K Primary Switch Reboots Failover

Oct 17, 2012

We have Nexus 5K switches at the aggregation layer and VPC domain has been configured on them. VPC domain includes switches at the access layer as an identity.But when primary switch reboots failover didn,t happened. We are attaching architecture diagram for the setup along with show tech for Nexus 5K both switches.

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Cisco Security :: To Put A Switch 3750 In Place Of 2811 Router

Dec 29, 2011

I have an ASA 5510 that I want to connect to 2 isp (one of my private network uses the isp1, and all others the isp2). Excluding the 5510 does not accept PBR(policy based routing), i saw that you could put a router, like cisco 2811 in front of the ISP. my questions are : can i put a switch 3750 in place of the 2811 router? , I have vpn connections in isp1, this architecture is compatible?

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Cisco Infrastructure :: 2811 Router Is Sitting Behind 3650 Switch?

Jul 9, 2012

Seeing very strange behaviour my 2811 Router is sitting behind  3650 switch, when the link between switch and router is trunk the router start rebooting itself, to test i changed to access mode then I can see ip address of router on cdp neig de or else not seeing ip address of router.

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Cisco WAN :: 2811 HWIC Switch Cannot Be Configured As A Network Interface

Apr 14, 2012

I currently have a Cisco 2621 powering a network at our  co-location facility... It's a simple setup and is working well. The colo  provides a redundant HSRP uplink, so I have their two uplinks going into  a Dell switch. From that Dell switch I have a uplink into  FastEthernet0/0 on the 2621, configured with my routing network, and  then FastEthernet0/1 gets an address from my block of routable IP. FastEthernet0/1 then plugs into another  Dell switch where I have all my servers connected. The servers get public routable IP addresses and use the address on FastEthernet0/1 as their default gateway.
 
It's time to upgrade off the 2621, so I aquired a Cisco 2811 which has two FE interfaces, as well as a modular HWIC-4ESW switch. My question is, can I get rid of the Dell Switch A in the setup above and just use the internal switch on the 2811 to accomplish the same thing? And I if I did this, would my two uplinks from the colo plug into ports 1 and 2 of that HWIC, and then port 3 would physically connect into FE 0/0? Or can I logically do that via configuration in the Cisco? I'm not sure how all this works and haven't received the new router yet, so I thought I'd get a head start and reach out to the experts.
 
My second question is unrelated, but each port on the HWIC switch cannot be configured as a network interface right? I'm pretty sure they can't as they aren't considered network interfaces but just thought I'd ask.

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Cisco Switching/Routing :: Flapping Between Router (2811) And Switch (2960)

Jul 23, 2012

we have cisco 2960 switch which is connected to a cisco 2811 router. flapping issue between these two devices??
 
The following actions i have taken, but no result.. I have changed cables. have set speed to 100 and duplex full on both the interfaces but the interfaces are showing up up still not getting connectivity. same i have to auto on both sides still no result what configurations should i set to resolve this issue...?

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Cisco Switching/Routing :: 2811 With 16 Port Switch Module Configuration?

May 12, 2013

I have a laptop with a single physical NIC which I have used the advanced management tools to create two virtual NICs (say vlan 10 and vlan 20) and both are on the same subnet (say 192.168.4.x). One NIC is for normal TCP/IP traffic and one is for broadcast/multicast traffic (I have some custom software that requires this to be the case and works fine on an older laptops with built-in physical NIC and PCMCIA XIRCOM NIC). The dual NIC laptop communicates with a dual NIC server via a Cisco 2811 router (which has a 16 port switch module at the back) and has vlans set up so.
 
What I want is for the single NIC laptop (with two virtual NICs) to be able to also communicate with the server. Basically, one NIC is for normal traffic and one is for multicast/broadcast traffic. All three machines need to be able to talk to each other using the NIC for normal traffic and both laptops must be able to receive broadcasts from the server. What is the best way to configure the router to handle the trunking/tagging? Most configuration documentation I read has two complete subnets for the two virtual NICs. Note that all three machines use static IPs and are part of a workgroup so no DNS and domain servers etc.

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Cisco WAN :: 2811 Router And 3560-48 Switch / Test Cable-diagnostics Output

Feb 26, 2012

what's the meaning of the output:
 
 Interface Speed Local pair Pair length        Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi0/40    100M  Pair A     2    +/- 4  meters Pair A      Normal
Pair B     2    +/- 4  meters Pair B      Normal
Pair C     2    +/- 4  meters Pair C      Short
Pair D     2    +/- 4  meters Pair D      Short
 
From the command

test cable-diagnostics tdr int gi 0/40
 
It's normal?If not, then. the problem is on the cable or on one of the interfaces?The interface is connected between a fastethenert on a 2811 router and a 3560-48 switch.The cable is a straight through cat 5e cable. (I have changed several cables with same result).

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Cisco Wireless :: 2960g Switch - OEAP 600 Bridging Dual-rlans?

May 21, 2012

I have established dual-rlans on different segments.I have a 2960g switch.  I created vl2 (management) and vl3 (data).I connected rlan1 (port4) to vl2 and rlan2 (port3) to vl3.My laptop receives a dhcp address on vl3 and the switch (in dhcp mode) receives it's proper address on vl2.Unfortunately a MAC is assigned to each vl and to the management interface.  Thats 3 out of the 2 sets of 4.

So a managed switch is NOT the desired device to have on the back side of an OEAP600.In any case doing a show mac address-table revealed that all the vl2 MAC addresses were duplicated on vl3.To the tune of 216 addresses.  108 in each vlan.  Which is a close match to the current host counts for each segment 98 + 18.Obviously this application is not what was envisioned by the OEAP team during work-up.The goal of 4 host devices on the rlan is proving difficult to achieve.The client wants 2 pc's and 2 digi-port servers.

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Cisco Switching/Routing :: High CPU Utilization On 4510R Switch With Dual SUP V -10G

Feb 14, 2012

We have a problem of igh CPU Utilization in Cisco 4510R-with dual SUP V-10G modules.
 
Cisco 4510R switch is the CORE switch and have 30 no's of VLans. It was running PVST/PVST+ previously. But Now we have migrated to MST. But after upgradation the CPU utilization reached alomst 98%.

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Cisco Switching/Routing :: 5520 Dual Core Switch For Redundancy

Sep 16, 2012

I have the following: 1 5520 ASA connected to the internet, 2 core switches, and several access switches.Aside from implementing RSTP, VRRP, hard code access and trunk ports, is there any other recommendation you would like to add.

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