Cisco VPN :: 1800 GETVPN Crypto Map On Loop Back
Jan 12, 2013
We have 6 WAN routers connected through ISP MPLS cloud , we need to implement GET VPN between these WAN routers.We have 2 Key servers (1800 routers) , and the WAN routers will act as Group Members (6 GMs)
The attached configuration files are for working configuration for typical GETVPN (crypto map applied on WAN interface)
In Key server configuration , the crypto isakmp command is using the WAN interface IP address of each WAN router (172.16.x.x) , and since that the KS routers are connected to local backbone (VSS) , they should be able to reach 172.16.X.X , and therefore the subnet 172.16.X.X is advertised to the local network (check GM configuration file under eigrp - redist connected )
This is what our customer want to avoid ! they do not want 172.16.X.X to be advertised to the local network .I know It is possible in GETVPN configuration to configure ,the crypto isakmp command to use loopback address's of the WAN routers instead of the WAN IP , but in this case the crypto map must be applied to the loopback address , and this requires all traffic to be encrypted and decrypted to go through the loopback interfaces on all WAN routers .
i was wondering what is the best solution for this case , I though to use the below config on the GM's
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Sep 3, 2012
I ahve a requirement to configure static crypto for 1800 site and I need to configure on two sepaarte interfacs at spoke site which means I need to configure 1800*2 = 3600 peers at central site. The challenge I have is due to load balancing , the traffic dynamic crypto can not be used since traffic may be initiated from Dc on other link which may get dropped incase not encrypted.
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Aug 12, 2011
What is the purpose of loop back testing.
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Apr 21, 2013
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Sep 30, 2011
I recently replaced a client's router with a Cisco RV 120W. The client employs a web-based application on an internal server that manages their business. Workers in the field use a handheld device power by WIndows Mobile to access a mobile version of the the web-based app. Data contained on the mobile app syncronizes with the server when workers choose a sync menu. Some workers perform this sync in the field, others wait till they return to the office and use the wireless provided by the router. Prior to changing the router, the synching worked fine either inside or outside the company network. The mobile app accesses the internal server via the router's public IP address. The router forwards the http requests to the internal server. But now the synching does not work internally. I assume it's because the Cisco RV 120 W does not support NAT Loopback, or I simply haven't figured out how to enable it. Does anyone know how to enable NAT Loopback on the RV 120 W so I can access the web-based app by through the router's external IP while on the private side of the LAN??
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Jul 12, 2011
I am working with a device that does not have a physical reset button on it, and have mistakenly typed in 127.x.x.127 for it's IP. I was trying to use 172, but mistyped and didn't catch it until after I had rebooted the unit. Is there anyway that I might be able to gain access to the device. My PC is running Windows 7, but I am familiar with linux as well. I have attempted to change the loopback adapter IP to 128 on a ubuntu live disc and set my ethernet port to the subnet the device is on with no avail. (I am also using vlans on the device, but believe I have them set up correctly)the device is set to IP: 127.x.x.127 netmask 255.255.255.128. [code] I know that the last octet of 127 is the broadcast IP for the range, but have been able to address similar blunders before by forcing myself to a /24 subnet to correct that.
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May 7, 2012
I am terminating GRE vrf-lite on my 7600 and using loopback as source for each client.I found one problem where 7600 seems to be not forwarding traffic until I delete create the tunnel interface.Worked fine for a week. Then stopped again. I had to delete,create again tunnel interface.
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Sep 5, 2011
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I've tried various combinations of tagged/untagged ports, PVID's, etc. As a first test I've bypassed the Fiber Test set and simply created a direct connection between ports 9 and 10. I am unable to get the traffic from Host A to Host B to get routed through ports 9 and 10 (I ping each host from the other and get no response).
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Feb 19, 2013
I need to NAT a port range spanning from TCP and UDP 50,000 to 59,999 from inside global address 58.96.x.x on loopback2 to an inside local address of 192.168.5.5.Currently all the existing NAT translations are 1-to-1 that map inside global addresses on a wide span of Loopbacks and a Dialer Interface to inside local addresses on few subnets which are fine.I'm using an 1811 with an ADVIPSERVICESK9-M image, version 12.4(6)TS
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Nov 22, 2012
I am having a hard time trying to configure DMVPN with the tunnel being sourced via a loopback interface. All routers are Cisco 886 routers which don't have L3 ports.That is why I used SVI interfaces, and have configured the L2 ports (Fa0, Fa1, etc.) with the command switchport access vlan.The problem is that I am receiving Invalid SPI error's only on the Hub router and I have no clue what could be the problem, because they use exactly the same parameters for IPsec. [code]
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Jul 4, 2012
How to create loopback cable for gig copper port (cisco 6513).I
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Nov 17, 2012
I have a couple a questions answers on which i cant google for a period. BTW maybe i simly use wrong aproach to choose keywords.
1) Is it possible to assign same ip address to the same client each time it authenticated, preferably without using DHCP? Im definely sure that it possible but cant find corresponded configuration examples (my device is Cisco 1921 with IOS 15.0.1).
2) Is it possible to assign dynamic crypto map to loopback interface (the purpose to make EASY VPN Server accessible through two interfaces - maybe you recommend other approach instead?) - as i move workingcrypto map from phy int to loopback - i cant connect with reason "Phace1 SA policy proposal not accepted"
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Jun 7, 2012
I have a bunch of 3750x switches that each have a 10 gig routed link back to a central 4507 (loopback = 172.30.255.255).We carved up a /24 (of course, the /24 doesn't really exist except in our address tracking spreadsheet) into a bunch of /30's for routed WAN links and /32's for loopback addresses.We started on the low end for /30 subnets (ie 172.30.255.0/30, 172.30.255.4/30, etc.).We started at the high end for the /32 loopbacks (ie 172.30.255.255/32, 172.30.255.254/32, etc.)
Well, when I try pinging 172.30.255.255 from the access layer 3750x switches, the 3750x seems to be treating it as a broadcast ping where it lists each member that responds instead of the regular !!!!! response (this makes think something is odd with the 3750x). Of course, only one member responds (the core). But even the core seems to respond with the other end of the /30 instead of the actual /32 loopback (which makes me think something is odd in the core). I could have sworn that I've setup similar topologies without problems (ie, using 10.0.0.0/32, 10.255.255.255/32, etc as loopbacks) and as long as the mask is a /32, it should work.Also, I can ping/ssh to that loopback if my laptop is on a directly connected subnet. But I can't do it from any of the 3750x switches (which are also directly connected).I've double checked for overlapping subnets, but nope. I don't see any. Routing looks fine. The actual /32 is being propagated everywhere properly.
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Aug 18, 2012
The following error was seen on the switch and the Diagnostic Test Loop back failed following a new WS-6748-SFP module installation.Fabric in slot 5 detected excessive flow-control on channel 3 (Module 4, fabric connection 1)
Tried Hard reset of the module and still the error persist.
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Nov 4, 2011
Why is loop-back only working on ports forwarded in the Virtual Server section and not Port Forwarding or even DMZ? I have seen a post about loop-back on the DIR-655 from a while ago that had said to disable SPI and change NAT Endpoint to independent, I have done this and loop-back still doesn't work.
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Apr 6, 2012
Here is my Lab Setup: 2691 is BGP nei to R4 router and they are not directly connected. 2691 and R4 are in same AS 6500. 2691 Config---router ospf 1 network 3.3.3.3 0.0.0.0 area 0 . Its advertising its loop back IP to OSPF domain.
router bgp 6500
no synchronization
bgp log-neighbor-changes
neighbor 6.6.6.6 remote-as 6500
neighbor 6.6.6.6 update-source Loopback3
[code]...
R4 Router
router ospf 11
log-adjacency-changes
network 6.6.6.6 0.0.0.0 area 0
[ code].....
We can see that 2691 and R4 are BGP neis and 2691 has 200.1.x.x routes in its route table. My question is why from 2691 router i am unable to ping any route learned by BGP from R4?
2691Router# ping 50.1.1.0 Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 50.1.1.0, timeout is 2 seconds:.....Success rate is 0 percent (0/5)2691Router#ping 200.1.2.0 [ code]...
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Sep 14, 2012
I am trying to configure a loop back interface like so: [URL], on the following device:
C3550 Software (C3550-IPSERVICESK9-M), Version 12.2(50)SE, RELEASE SOFTWARE (fc1on port gig0/1 which is using a 1000Base-SX adapter. This is for troubleshooting purposes and it does not appear to be a feasible option. Is there another way to accomplish in the IOS?
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Jan 16, 2011
is it possible to assign a loopback address to a typical switch port on a 2950 switch? I want to be able to have some devices connected to a switch to test access lists and VLANs.
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Jun 6, 2011
I need to connect site to MPLS provider and run Cisco GETVPN.Problem:I have been browsing Cisco Feature Navigator Tool and to my surprise when I enter "platform:3745" I can't find an image compatible with GET VPN. there is no workaround (image) I can run GET VPN on 3745? I need IP routing (BGP, OSPF) as well.
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Sep 29, 2010
I've done some tests and it seems that a 7201 supports GETVPN without a VAM, but in the design guide it states that this is needed.Is this needed as the 7201 documentation states that it performs IPSEC encryption in hardware without a VAM.
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Jul 2, 2012
Where's the ideal place to put the KS? My current setup is 1 KS, 19 GM. The KS sits BEHIND a GM, so all other GMs have to come through one GM to get to KS.Now, I have purchased two dedicated KS routers. I configured one today, and placed it right on my WAN. My WAN is a L2 Ethernet domain, so i just provisioned a switch port in the WAN vlan, and away we go. I copied RSA keys over from the current KS, configured redundancy and the two hooked up, saw each other and it seems to be good to go. For the ACL, I put in an exclustion for my two KS to talk to each other:
deny ip host 192.168.250.40 host 192.168.250.41 (Old IP, New IP)
deny ip host 192.168.250.41 host 192.168.250.40.
I used a test router and pointed it to the new KS, it registered without a hitch... HOWEVER about two hours later (my 7200 second timeout) I lost ALL my branches. My 18 other GM were still pointed to the OLD IP only, they didnt have the second IP configured yet. In a hurry, I quickly disabled the redundancy configuration on the old KS and had to go to each GM and do a 'clear crypto gdoi' on each one to get them to re-register. There were no log messages about not being able to rekey, no log messages about dropped peerings, nothing. Once I did that, everything returned to normal.
The Question I have...
Would having configured the redundant KS caused this problem? Would having one KS behind a GM and the other Coop KS in the WAN make a difference?
Relevant config from existing KS, 2801:
crypto gdoi group GETVPN_GROUP
identity number 1234
server local
rekey retransmit 60 number 2
rekey authentication mypubkey rsa GETVPN_KEYS
[Code]...
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Aug 15, 2011
What is the minimum platform that supports GETVPN over DMVPN?
I have been looking around cisco website but couldn't find a document with the supported platforms.
We have branch offices with Cisco 861 routers and i would like to know if we could use GETVPN with these routers.
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May 12, 2009
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Nov 25, 2012
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Apr 11, 2013
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Nov 25, 2011
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Serial0/0 is down, line protocol is down
Hardware is PQUICC with Fractional T1 CSU/DSU
Description: DTE side
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
[code]....
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