Cisco WAN :: 1921 - Route Between VPN Tunnels
Jul 7, 2011
I have a Cisco 1921 and it has 2 VPN IP-sec site-to-site tunnels up and running. Lets say the tunnels goes from the Cisco to Site A and Site B.
Now i want Site A to reach Site B through the existing tunnels. I'm guessing that static routes maybe the answer but i cant seem to get it working.
The LAN networks is as follows:
Cisco: 192.168.15.0/24Site A: 192.168.0.0/24Site B: 10.27.27.0/24
At Site A i have set up a static route as follows:
Traffic destined for 10.27.27.0/24 Go to gateway 192.168.15.1 (the default gateway of Cisco LAN)
At Site B i have set up a static route as follows:
Traffic destined for 192.168.0.0/24 Go to gateway 192.168.15.1 (the default gateway of Cisco LAN)
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Nov 8, 2011
I need to know how many IPsec VPN tunnels one Cisco1921 can support reliably. Haven't had any luck sifting through documentation on the web.
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Jan 12, 2013
I have an issue where I can get traffic to pass from HDQ to two branch offices over our ipsec/gre tunnels even though the tunnels appear to be UP. The HDQ is a 2811, branch is a home office using an 871W and branch runs a 2801 router. I initially had HDQ working fine with the 871W but when I configured branch2 (2801), they both broke. The tunnels appear to be up but traffic is not routing across them. The two 2801 routers run 12.4 (c2800nm-adventerprisek9-mz.124-24.T2.bin). These are gre over ipsec tunnels. Currently traffic flows over an exsting MPLS network that we are getting away from due to cost. As soon as I change the routes to point to the Tunnels, it breaks. Traffic doesn't appear to pass through the tunnel. I have attached my sanitized configs.
HDQ#sh crypto sessCrypto session current status
Interface: FastEthernet0/1Session status: UP-ACTIVEPeer: 205.205.205.21 port 500 IKE SA: local 204.204.204.66/500 remote 205.205.205.21/500 Active IPSEC FLOW: permit 47 0.0.0.0/0.0.0.0 0.0.0.0/0.0.0.0 Active SAs: 4, origin: crypto map IPSEC FLOW:
[Code]....
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Nov 28, 2012
I am trying to get the Cisco 1921 to route between 2 LANs. I can ping from the router itself, but cannot ping across either, is there something I am doing wrong here:
version 15.1
!
no aaa new-model
!
no ipv6 cef
ip source-route
ip cef
[code]....
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Feb 18, 2012
The router passes the Interface test for the WAN port in CCP but it still we cannot access the internet. Here is my configuration:
Building configuration...
Current configuration : 3663 bytes
!
! Last configuration change at 09:29:52 Chicago Mon Feb 20 2012 by fbcpekin
version 15.1
[Code].......
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Sep 30, 2012
We have Cisco 1921 routers that a provider is using for MPLS. They have it configured so that all internet trafic is passed to an internal ip address that is our proxy server. However, they are pushing all of the routing rules down to the workstation which is causing the local route tables to grow to be massive in a very short time.
For example, the second I ping a website, the ip address is resolved and then the route is added for the source ip address with the default gateway of the proxy server.
Is this normal? I would have thought that all the rules would have been handled by the router and let it keep the table entries.
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Apr 20, 2011
We are using a CISCO1921-SEC (ISR) with IOS 15.1 and we configured a "crypto isakmp client configuration group". We can connect with the "Cisco System VPN Client Version 5.0.07.0410" via IPSec/UDP.
1. Is it possible to push routing informations to the System running the VPN Client ? A the moment all traffic is routed to the tunnel but we like only one route to the network permitted with "pool ..." in the "crypto isakmp client configuration group NAME" section.
2. We searched for changing from upd connection to tcp connection via special port. Is it possible with IOS 15.1 on the CISCO1921-SEC ? Is there something possible like "iskamp ipsec-over-tcp port 10000" ?
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Jun 16, 2011
I've got an existing Cisco 1841 connecting to a 10Mbps Internet Leased line. With my current setup I've configured PAT for internet access for my users, and we also have some servers on site which are assigned public ip addresses, these can be accessed from the internet. Now we have procured a Cisco 1921 ISR to replace the old 1841, when I connect the 1921 with an identical configuration in place of the old router, 2 things happen.
1) The users accessing the net via the nat are able to work without any inconvenience (good)
2) My servers which have public IP addresses are unable to reach the internet and subsequently I am unable to reach them via the internet (very bad)
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May 1, 2011
Have cisco router 1921 and 3 cisco switch 3560G i want to configure the cisco router so as network 192.168.4.0/26,192.168.3.0/26,192.168.2.0/26, all to access internet R1921(config)# ip nat inside source list 102 int G0/0 overloadR1921(config)# access-list 102 permit ip ?
I am right to do this below?
R1921(config)# ip route 192.168.4.0/26 10.10.10.2R1921(config)# ip route 192.168.3.0/26 10.10.10.2R1921(config)# ip route 192.168.2.0/26 10.10.10.2
assist on access-list and ip route?
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May 28, 2013
Have a 1921 that has 3 eth connections (1 LAN, and 2 WAN) - I have 2 seperate OSPF processes (2 areas) on the WAN Ints - both upstream WAN's are sending defaults back to the 1921, and the 1921 is sending it's LAN range to them.
I have ip ospf cost 150 set on the "failover" WAN connection interface (Both on the 1921 and upstream), but the 1921 is preferring the default route from the "failover"?
The default routes are both being received by the 1921, but it's preferring the "failover" Int with the ip ospf cost 150 configured?
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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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Jun 24, 2011
I've enabled antispoof on all interfaces on asa 5510.If you start a traceroute to a network on the default route, everything works, since replies comes to an interface with route 0.0.0.0/0 defined.If you start a tracer route to a network that is NOT on the default route (let's assume coporate MPLS), you only get response from first carrier router, the other are discarded because of anti spoof violation.
I have ICMP inspection and icmp-error inspection enabled.
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Aug 16, 2012
My ASA's have the follwing Versions: ASA Version 8.4(3) ASDM Version 6.4(7)Have I a chance to configure a site-to-site tunnel with a hostname as peer address when I will use Identity and CA Certificates?
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Dec 14, 2011
I set up a full mesh LAN-to-LAN VPN for a client with 4 sites. Each site has an ASA 5505 running 8.2(5). Site-to-site VoIP traffic runs in the VPN tunnels, as well as traffic to/from a file-server located at the main site. There are two back-up servers, one at the main site and one at a remote site. The main site has 2 bonded T1s and the other three sites have a single T1. How should I go about setting up my QoS?
My top requirement is that VoIP traffic will never be pushed out of the way for data traffic. My secondary consideration is to give more preference to file-server traffic than to web traffic and to make back-up traffic the least important. I'm currently researching to see if the VoIP provider is DSCP marking EF on the VoIP traffic, but I am going to assume they are for now. I know the IP of the file-server and back-up servers.
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Feb 20, 2013
Is there a recommended number of GRE tunnels that Cisco 2921 ISR router with default configuration (512MB DDR2 ECC DRAM) can support?
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Jun 5, 2011
I have read that the cisco 1841 can handle up to 100 VPN tunnels by default. Can this IOS version handle SSL VPN tunnels as well?
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May 7, 2008
Configuring MPLS over GRE tunnels. I did not find any proper configuration example. I need to do this for encrypt the traffic between two PE routers. I have 7609 routers.
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Jun 20, 2012
I am trying to setup a VPN tunnel between a PIX and an ASA. I went through the IPSec Site to site wizzard using the same settings but I cannot ping hosts from either side.
Here is the setup
ASA 5520
Device Manager 6.4(5)106
Software version 8.0(5)
Inside network 10.0.0.0/24
Inside IP 10.0.0.1
[code]....
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Sep 10, 2012
I have an ASA5515 and our remote sites which have a mesh topology of VPN. At some times of the day router to particular links are down do to the ISP core, but the tunnels from the same firewall can communicate to other sites. Is it possible to have a way where you could route traffic to another ASA which has a connection to both the ASA which want to communicate and have the traffic hairpinned, I know this is possible but is it possible to make this automated.
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Jul 8, 2012
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Jun 13, 2012
We have multiple sites that have either fiber 20mb d/u or cable 50/10 d/u. Recently we have upgraded our head end router to a 2921 security based router and noticed that no matter if we are sending or receiving the most we can push is 1.6Mb. I would expect this number to be at least 8Mb for uploading and at least 18mb for downloading from other sites.I have included parts of my config and screen shots of bandwidth usage for troubleshooting. [code]
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Jul 17, 2012
I am having an issue where the GRE tunnels are up/up but are not pingable. The GRE tunnels are on a cisco 1811 and cisco 2811 routers The tunnel source and destination IP addresses are private addresses. These private addresses are pingable to each other and they are connected via IPSEC. The IPSEC tunnels are generated from the ASA to which the cisco routers connect. Probably the tunnels are up/up because keepalives are not configured. But I am still not able to see why I cnt ping the end points. The ACL for IPSEC in ASA includes the "permit gre host <Private IP 1> hist <Private IP 2>" commands.
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Jun 27, 2011
I have 3 tunnels established (full mesh) with 3 CISCO ASA (all security+), through Internet : - Site A : ASA5510 - Site B&C : ASA5505, There is no main site or client site, each site has more than one network behind it. So I'd like to setup OSPF between all the ASA for them to exchange their route within the tunnel. I thought this was automatic when establishing the tunnel, but it isn't.
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Nov 5, 2012
My current set up is 1 HQ router (2911 ISR) and 8 site offices with a non-Cisco router.Each site has an IPSEC tunnel back to the HQ router.All of the site routers have a dynamic external IP address.This set up has worked ok for now, but I would like to look at moving to GRE tunnels so traffic from the sites can be routed to each over.I have read up on the configuration and I can set up an IPSEC GRE Tunnel in test labs using a static IP address on the spokes however I have not been able to find any documentation on how to configure the HQ router to allow the tunnels from any IP address.I did try setting the tunnel destination to 0.0.0.0 on the HQ side but this does not work.
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Mar 22, 2012
I am a employed at a credit union with 17 branches. We have a mpls circuit connecting the branches to our main office. I setup DSL as a backup connection. I have 17 RV042 Cisco VPN Routers. I created a secure vpn tunnel for every branch to the main office. I made a delayed route in our main router to fail over to the VPN, in case the mpls failed. Almost everything works great except our ATM's are required to connect to a router at our main office to a different subnet than the tunnel is connecting, therefore not routing through the tunnel. I've tried creating another tunnel but only works with one of the branches, cause I get a conflict at the main office when I try a second tunnel with the same ip network. Also I tried routing all the traffic through the vpn by putting in the address 0.0.0.0 subnet 0.0.0.0, at the branch site. But I can only do that for one branch, The Downtown Cisco won’t let me create another tunnel with that setting.
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Jun 12, 2012
I have problem with topology view in LMS 4.2.1, it doesn't show the tunnels connecting branches, though both devices are shown in sh cdp neighbour command output. If I choose Show Devices in Admin > Collection Settings > Data Collection, it is showing cdp neighbours correctly.
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Sep 9, 2012
I have been tasked by my boss of finding out and implementing a solution of building GRE tunnels from 2 4408 Wireless controllers system for a guest wireless network. I am but a low CCNA wireless, working on getting motivated for CCNP wireless, but I didn't even know if this was possible and if it was where to begin. I have been reading configuration guides but figure I should ask the wireless experts of the world of Cisco.
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Sep 22, 2008
I'm trying to monitor Tunnels activity. We want to gather statistics like bandwidth utilization per Tunnel and in the case of Remote Access also the user name associated with a tunnel. All this via SNMP
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In regard to Remote Access I found the CRASSessionTable From here I can obtain the Group associated with the tunnel and I should be able to obtain the User name through the 1.3.6.1.4.1.9.9.392.1.3.21.1.1 OID, but I'm getting an UnSupported response when querying this particular OID.
What OID can provide the User name?
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May 26, 2013
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how configuring IPSec Tunnels on my router?
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Nov 13, 2012
I have an ASA 5510 running ver 8.0(2) that has (4) Ipsec tunnels going from it to various other locations. I am having an issue with data transfer speed on only one of the Tunnels. This tunnel is between the 5510 and the 5555, on that link I am getting a dat transfer rate of a little over 120k a second, whereas if I pull the same set of files from another location I am seeing a transfer rate of 5m per second.
I have verified that it is not a capacity issue on the Internet bandwidth on both locations, and I can pull the same data from the same location to various other locations via Ipsec tunnels, I am only having an issue with a specific tunnel going from the 5510 to the 5555.
Since it is not affecting other tunnels on the 5510 nor is it affecting tunnels on the 5555 going to other locations, I am leaning toward a routing issue within the ISP? I will say the ISP is taking me a long way around to stay in the same Metropolitan area.
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May 14, 2012
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Jun 13, 2013
we are testing an ASR1002-X which acts as LNS for L2TP tunnels.
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but ping remote IPs don't work !!! [code]
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Sep 27, 2011
We have 2 Cisco ASA 5520 configured as Active/Standby with public IPs 68.171.xxx.xx6 and 68.171.xxx.xx7 respectively.We have 3 different vendors who are trying to access our Data Center. Do I have to have 3 different public IPs for these 3 different vendors? Or, just share the public IPs assigned to our 'Outside' interface?
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