Cisco VPN :: 1811 / Dual-Hub DMVPN With PKI And Subject-name Don't Work
Oct 15, 2012
I have a Dual-Hub DMVPN with PKI dep[oyment infrastructure and with 2 Hub on Cisco 1811 and Spokes on Cisco 1841. When I enter the 'subject-name' parameter (pki trustpoint configuration mode) on a Spoke routers, one of two Tunnel is up, but the second Tunnel is not up. ISAKMP-negotiation select the rsa-sig-mode is correctly. If I select pre-shared-mode or if i remove 'subject-name' from Spokes, DMVPN work is fine!
Configuration example:
1. HUB:
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Cisco IOS Software, C181X Software (C181X-ADVENTERPRISEK9-M), Version 12.4(15)T15, RELEASE SOFTWARE (fc3)
Technical Support: [URL]
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Tue 08-Mar-11 06:09 by prod_rel_team
[code].....
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Sep 25, 2011
I have a Dual-Hub DMVPN with PKI dep[oyment infrastructure and with 2 Hub on Cisco 1811 and Spokes on Cisco 1841. When I enter the 'subject-name' parameter (pki trustpoint configuration mode) on a Spoke routers, one of two Tunnel is up, but the second Tunnel is not up. ISAKMP-negotiation select the rsa-sig-mode is correctly. If I select pre-shared-mode or if i remove 'subject-name' from Spokes, DMVPN work is fine!
In what there can be a problem?
Configuration example:
1. HUB:
crypto pki trustpoint TRUSTPOINT-CA1
enrollment mode ra
enrollment url http://.../certsrv/mscep/mscep.dll
password ...
[ code]....
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May 12, 2011
Scenario:
Central Router (WAN: 1.1.1.1) <--> Internet <--> (WAN: Dynamic IP) Branch RouterTunnel 172.31.254.1/26 Tunnel 172.31.254.9/26
Central router is a Cisco 1811 running IOS c181x-advipservicesk9-mz.151-4.M.bin.Branch router is a Cisco 1941 running IOS c1900-universalk9-mz.SPA.151-4.M.bin.
When I do a Ping test directly from the branch to central router over the Internet I have no packet loss:
branch#ping 1.1.1.1 source GigabitEthernet 0/0 repeat 1000Type escape sequence to abort.Sending 1000, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:Packet sent with a source address of 192.168.0.100!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!(...)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Success rate is 100 percent (1000/1000), round-trip min/avg/max = 40/41/60 msbranch#
When doing a Ping test over the DMVPN tunnel (which is using the WAN IP as source) I see packetloss.
branch#ping 172.31.254.1 source Tunnel 3 repeat 1000Type escape sequence to abort.Sending 1000, 100-byte ICMP Echos to 172.31.254.1, timeout is 2 seconds:Packet sent with a source address of 172.31.254.9!!!!!!!!!!.!!!!!!!!!!.!.!!!!!!.!!!!!..!!!!!!..!!!!!!!!.!!.!!!!!.!!!!!!!!!!!!.!!!!!.!!!.!!!!!!!!!!!..!!!!.!.!.!!!!!.!!!!!!!!!.!..!!!.!.!!!!!.(...)!!!!!!.!!!.!!!!.!!!!.!.!!.!!!!!!!!!!!!!!!.!!.!!!!!!!!!.!!!.!!.!.!!!!!...!!!!!!!!!!..!!!!!!Success rate is 79 percent (795/1000), round-trip min/avg/max = 40/43/568 msbranch#
Central:
interface Tunnel0 description Testing (DMVPN) bandwidth 10000 ip address 172.31.254.1 255.255.255.192 no ip redirects ip mtu 1400 ip nhrp authentication testing ip nhrp map multicast dynamic ip nhrp network-id 1 ip nhrp holdtime 600 ip nhrp redirect ip tcp adjust-mss 1360 no ip split-horizon eigrp 1 tunnel source FastEthernet1 tunnel mode gre multipoint tunnel key 100003 tunnel bandwidth transmit 10000 tunnel bandwidth receive 10000 tunnel protection ipsec profile secure_profile shared
Branch:
interface Tunnel3 description Testing (DMVPN) bandwidth 2000 ip address 172.31.254.9 255.255.255.192 no ip redirects ip mtu 1400 ip nhrp authentication testing ip nhrp map multicast 1.1.1.1 ip nhrp map 172.31.254.1 1.1.1.1 ip nhrp network-id 1 ip nhrp holdtime 300 ip nhrp nhs 172.31.254.1 ip nhrp shortcut ip nhrp redirect ip tcp adjust-mss 1360 no ip split-horizon eigrp 1 delay 1000 tunnel source GigabitEthernet0/0 tunnel mode gre multipoint tunnel key 100003 tunnel bandwidth transmit 2000 tunnel bandwidth receive 2000 tunnel protection ipsec profile secure_profile shared
Crypto parameters on both central and branch routers:
crypto isakmp policy 1 authentication pre-share
crypto ipsec transform-set secure_transform-set esp-3des esp-sha-hmac mode transport
crypto ipsec profile secure_profile set transform-set secure_transform-set
I disabled CEF on both the central and branch routers and no success. The EIGRP neighborship appears to be stable.
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Nov 25, 2012
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Gi0/0 to FTTB (Dialer1 connects to Internet)
Gi0/1 to DSL (Public IP towards 877 demarc)
Tun0 attaches to Dialer1 public IP and connects to other spokes, no VRF
Tun1 attaches to Gi0/1 public IP and acts as DMVPN hub (ip nhrp map multicast dynamic) under VRF "Hub"
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Feb 20, 2013
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Apr 1, 2012
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no service pad
service tcp-keepalives-in
service tcp-keepalives-out
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
[code]...
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Nov 13, 2011
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here's relevant section of the config
Code:
track 123 ip sla 1 reachability
delay down 15 up 10
!
track 456 ip sla 2 reachability
delay down 15 up 10
[code]....
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Region : Denmark
Model : TL-WDR4300
Hardware Versin : V1
Firmware Version : 3.13.23 Build 121225 Rel.37950n
ISP :
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Oct 6, 2012
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Dec 17, 2012
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I've attached a diagram of what it should look like. Red indicates our internal network and Blue indicates the guest network. I can send screenshots as well.
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Mar 29, 2012
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I got problem though when i tried more complex connection diagram. [URL]
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Nov 24, 2011
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Sep 5, 2012
I have a problem with my routers (cisco 1941)I'm running a DMVPN network (Hub and spoke)All the hubs are connected to the 2 hubs. With 4 tunnels. (each hub has 2 interfaces to the spokes. the spokes only have one interface to the hubs, so I splitted them and so I now have 4 dmvpn tunnels). one of the interfaces on a hub malfuntioned and because of that the customers had problems with logging in and sending packets. I made this kind of structure because of when one of the tunnels failed the spoke could use the 3 others... BUT, what happened here was that the spoke still tried to use all 4 of the tunnels and because of that I had 25% package loss!So this didn't work. Now I read about IP SLA, but I was wondering of this could work? (I cannot test it on spare routers, and I don't want to implement it and risking a total network failure...) and how to configure it. Should I make 4 different sla processes which I should all 4 track? And when I make the ip routes, how should I make or configure it so that 1 of the tunnels/interfaces fails that the spoke would addapt the routes?
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Sep 11, 2012
I have a setup with two Cisco 877's – 1 for the hub and 1 for the spoke. The hub has a static WAN IP and the spoke has a dynamic WAN IP. The two sites are tunneled with DMVPN and cert auth for connections via Cisco VPN Client (terminating on hub router). All routes between the two sites work fine – I can see through both ends via LAN IPs and tunnel IPs. I can connect externally through Cisco VPN Client and RDP into PC's on the spoke end via local IPs.
My issue is: I want a port forward on the hub router, pointing to the IP (172.16.1.X) of a device on the spoke end. So using the WAN IP of the hub router, I can reach a host on the spoke side. At this point I cannot get this to work and feel it's related to a NATing issue. Here is my current config for both sites:
HUB Router:
!crypto pki server vpn-ca database level names issuer-name CN=*** CA,OU=*** Services,O=*** lifetime crl 336 lifetime certificate 7305 lifetime ca-certificate 7305 lifetime enrollment-request 1000 database url nvram!
crypto pki trustpoint vpn-server enrollment url http://172.16.0.1:80 usage ike serial-number none fqdn none ip-address ***WAN IP*** revocation-check crl rsakeypair vpn-server 2048 auto-enroll 70 regenerate!
crypto pki trustpoint vpn-ca revocation-check crl rsakeypair vpn-ca!
[code]....
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Jun 27, 2011
I am trying to spec out some routers for a small DMVPN network.I was thinking 2801's for my hub routers.will these run DMVPN out of the box or do they need additional hardware modules?according to the below linkyou need a "AIM-VPN/SSL-2" module in order for it to work, but then according to"The Cisco 2800 Series supports IPSec Digital Encryption Standard (DES), Triple DES (3DES), Advanced Encryption Standard (AES) 128, AES 192, and AES 256 cryptology without consuming an AIM slot."
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Sep 9, 2011
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Nov 19, 2011
suppose i have 2 hub location and one spoke and i want to config DMVPN between them and want to keep 1 HUB as active and 2nd HUb as passive then how its possible.
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Apr 16, 2011
We have 7606 router without any ipsec module on it,so i check the ios and it has all commands in interface tunnel for configuring the dmvpn multipoint tunnel and also protection profile for ipsec! so i have this question: do we can run dmvpn between this router and our wan routers wich are 3845.
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Sep 10, 2012
What router would you choose to setup 1500 dmvpn tunnels (mGRE/ipsec)? so this router will be my hub and the hub will have 1500 tunnels.this router with this many tunnels will have to be able to provide excellent service to all spokes/tunnels.the spokes will mainly use the tunnels for business, transfering small files and some email I would say they may transfer 500megabyte of data per day but that's the absolute maximum.
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May 31, 2011
I have three Hub routers that I'm wanting to compare DMVPN scalabiltiy capabilities (3825 versus 3945 and 3845). I know it must be there somewhere and I'm just not looking in the right place. But I've read and read and read about DMVPN designs and I'm not finding anything. This is turning into a time killer. What are the DMVPN limitations of these three routers are?
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Feb 27, 2013
New to the forum and not much Cisco IOS experience let alone on the security side of things. I know how to navigate the IOS and can do basic switching and routing just fine. My company currently has a DMVPN setup w/ about 10 tunnels going back to the hub. We have 4 more sites they want me to setup and I keep getting stuck at the crypto maps. I have been reading about VPN's, DMVPN's , etc. for days now but can't find any examples of how we are configured. The priority of our crypto maps start at 65536 and go up. Default max is 65335 from what I have read, and I cannot assign a priority that high statically. [code]
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Jun 7, 2011
I'm trying to configure and DMVPN architecture with two routers ASR1006 to server a bank remote offices, one ASR in CO building and the other in CA building (CO: Operational Center; CA: Recovery Center).Each ASR have two LAN connections to internal network and two WAN links to remote office. Each WAN links belongs to differents provider.Each remote office has a router with two WAN links connected to that WAN providers.We are configuring the DMVPN considering two primary tunnels in the CO building and two failover tunnels in CA building.We made the configuration (schemas and configuration attached) but we only get two tunnels up at a time. We cannot ping from office router to four tunnels interfaces in both hubs.
We made some test disabling some tunnels and we could get communication only with two tunnels interfaces. We got communication through tunnels when we have just two.We want to have the four tunnels for high availability. We would like to know how to troubleshoot and make a design review because the examples and documentations are very limited.
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Apr 15, 2013
Trying to setup a DMVPN on out existing equipment that is currently running all point to point vpn connections. basicly its not working. my best guess is something with the config is interfering but i'm not sure the remote router (881) is always comming back with MM_NO_STATE and the main router(2901) is either MM_NO_STATE or MM_SETUP.
I added the config for the 881, 2901 and a debug crypto isakmp and debug crypto ipsec from both routers. I have verified the Keys are correct and it is not blocking port 500. if i issue a sh crypto isakmp policy they are the same on both routers. if you need me to post anything else i will, one note i removed the configs that were part of the point to point tunnls on the 2901 router.
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Apr 1, 2012
Is DMVPN supported on Cisco 7200 XVR NPE-400, and would the NPE-400 module support QoS, multicast etc. I found an old doc mentioning DMVPN and this specific module.
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Jan 1, 2013
I am setting up a DMVPN between several dozen sites using 2800, 2900 and 3900 series ISRs. The DMVPN Design Guide recommends current 12.4 or 12.4T IOS, but the DG was last updated in July 2008. I cannot seem to find any recommendations newer than this. I'm hoping Cisco or the community can give me an updated recommendation.
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