Cisco VPN :: 2811 IPsec VPN Network Over Transport Mode
Oct 27, 2012
I'm now trying to implement a IPsec VPN network over transport mode in my simple network environment.I got two Cisco 2811 routers connected each other and each router hosts a client PC running Windows7.
I have finished the configuration on both routers and make them running over transport mode.However, as what it should be, transport mode indicates the communication between two end stations (two PCs) the client PC (install or configure something) to make the network fully works?
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Aug 20, 2011
I would like to transport two time slots (TDM traffic) over an IP network in order to connect two telecom devices located in different sites, i have cisco 2811 routers on both sites with ip advanced services 12.4.20T IOS
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May 13, 2011
I find it hard to understand tunnel and transport mode, the differences between them, and NAT. Ok so I have this scenario: Site2site VPN with 2 Cisco routers.
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Dec 29, 2010
We have cisco 7600 Router with 76-ES+XT-4TG3C Module connected. The Module is getting detected after upgrading the Router with SRD5 IOS.Below are the testing which we have done on the Router but we are facing the issue while configuring the Transport mode LAN and Transport Mode WAN:Brief about this is:- 2 Cisco 7606-s Router with Module 76-ES+XT-4TG3C each.- two ports on 7606-s Ten2/1 & Ten2/2 are configured as a Transport mode WAN while Ten2/3 & Ten2/4 are configured as Transport mode LAN.- We connect Fiber Cable from LAN Port to MUX and from MUX to 2nd LAN Port of the same Router. Same thing we tested by using the WAN Port-MUX-WAN Port connection.- Now on MUX end LAN port, connected Single and Multi mode fiber and on 7606 end 2/4 port which is configured as transport mode LAN, using Multimode SFP module -> XFP-10G-MM-SR, port did not came up then replaced 2/4 port with single mode SFP ->XFP-10GLR-OC192SR port came up. this is testing for LAN.- For WAN testing on MUX end used WAN port and on 7606 end checked with single mode and multimode fiber and with single XFP-10GLR-OC192SR / mulimode XFP-10G-MM-SR SFP, port did not come up.Wanted to know 1) If we have to go for Transport Mode LAN then which SFP/XSFP Module should go with along with the Single/Multimode Fiber.2) If we have to go for Transport Mode WAN then which SFP/XSFP Module should go with along with the Single/Multimode Fiber.Anything else is required while configuring the Transport Mode WAN as this is for Packet-Over_SONET/SDH? 3) MUX Side change is required while connecting both of this Modes on Cisco 7600 Router.4) Is hardware of the Router is giving any issue? Though we tested by connecting Back to Back LAN Port as well as Back to Back WAN Port. In both the situation the Ports are coming UP.
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Nov 30, 2012
I have a requirement to connect two 3750 switch with 10G speed between two sites with 150km distance. We will lay-out our own fiber (48 core) between two sites. I just want to consult the following:
1. Could i use two core switch 6500 with single mode fiber as a transport equipment?
2. Or i need to use SDH equipment because of the distance concern? If so do i need a repeater?Could i use Cisco Metro Core ONS, which one?
3. Any other option to achieve this requirement?
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Jan 23, 2011
We have a remote office that needs to be connected to the central office through a site to site ipsec VPN.At the central site there is a 2811, and at the remote site there is 1841.Most of the traffic will be VoIP traffic and small amounts of data.
I need to setup some QoS that would firstly prefer the VPN traffic over internet access and then inside the VPN I need some QoS that will preffer VoIP over data.
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Jul 25, 2011
I am having problems with CPU load on 2811 with AIM-VPN-II. There is a GRE+IPSec over E3 WAN link and the authentication is done using RSA, but even that there is around 10Mb/s of traffic I have a 70 - 85%. I also have another WAN link with router 2811 that doesn't have a AIM-VPN, and that one reach 95% CPU once the traffic goes up to 5 Mb/s.
crypto isakmp policy 10
encr aes
authentication rsa-encr
[Code]....
Are there any recommendations that RSA authentication is not supportted for hardward encryption? It worries me, becouse have more sitautions like this.
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Oct 27, 2011
I have a 2811 that is my HQ router with a 10MB pipe. I was trying to configure a IPSEC tunnel to connect to my ASA that has access to our companies internal servers on the 10.33. and 172.16.31 network. I am having a problem getting phase 1 to even come up. I've looked over the configurations and unless i'm overlooking something I dont see what could be keeping it from at least completing phase 1
Below are the configs.
2811-CFG
crypto isakmp policy 10
encr 3des
hash md5
[Code] ....
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Dec 12, 2011
I am trying to get a 2811 to accept two IPSec peers however can only get one working at a time. I have setup fa0/0 and fa0/1 with their own public facing IP addresses with crypto maps associated to each interface however can only establish connectivity to one interface at any one time.
Relevent configuration below:
crypto isakmp policy 2
encr 3des
hash md5
authentication pre-share
group 2
lifetime 28800
[code]....
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Feb 22, 2011
I am trying to setup a L2L IPSec VPN between cisco VPN3020 concentrator and Cisco 2811 something is not working and I don't understand why.I describe my situation in detail my router has 2 interfaces
External interface Fa 0/1 ip 193.P.Q.R
Internal interface Fa 0/0 141.G.H.254
Lan on internal interface is 141.G.H.0/24
remote VPN concentrator has 2 interfaces
Public interface 131.A.B.C
Private interface 131.A.I.E
I have to set up L2L so that host 141.G.H.10 can talk to host 131.A.H.D whici is behind the VPN concentrator my router config:
crypto isakmp policy 3 encr 3des hash md5 authentication pre-share group 2crypto isakmp key * address 131.A.B.C!crypto ipsec transform-set presid-set esp-3des esp-md5-hmac !crypto map presid-map 5 ipsec-isakmp set peer 131.A.B.C set transform-set presid-set match address presid!interface FastEthernet0/1 ip address 193.P.Q.R 255.255.255.252 duplex full speed 100 crypto map presid-map!interface FastEthernet0/0 ip address 141.G.H.254 255.255.255.0 duplex auto speed auto!
ip access-list extended presid permit ip host 141.G.H.10 host 131.A.H.D
ip route 0.0.0.0 0.0.0.0 193.P.Q.S
Then I configured VPN3020 accordingly creating a lan to lan profile with the proper IKE proposals ecc ecc when interesting traffic is matched by VPN acl (presid) I see this messages in the VPN concentrator logs:
57101 02/23/2011 15:49:05.310 SEV=4 IKE/119 RPT=4033 193.P.Q.R Group [193.P.Q.R]PHASE 1 COMPLETED 57102 02/23/2011 15:49:05.310 SEV=4 AUTH/22 RPT=3935 193.P.Q.R User [193.P.Q.R] Group [193.P.Q.R] connected, Session Type: IPSec/LAN-to-LAN 57104 02/23/2011 15:49:05.310 SEV=4 AUTH/84 RPT=11 LAN-to-LAN tunnel to headend device 193.P.Q.R connected 57110 02/23/2011 15:49:54.820 SEV=4 IKE/123 RPT=1093 193.P.Q.R Group [193.P.Q.R]IKE lost contact with remote peer, deleting connection (keepalive type: DPD) 57112 02/23/2011 15:49:54.820 SEV=5 IKE/194 RPT=3778 193.P.Q.R Group [193.P.Q.R]Sending IKE Delete With Reason message: Connectivity to Client Lost. 57114 02/23/2011 15:49:54.820 SEV=4 AUTH/23 RPT=14 193.P.Q.R User [193.P.Q.R] Group [193.P.Q.R] disconnected: duration: 0:00:49 57115 02/23/2011 15:49:54.820 SEV=4 AUTH/85 RPT=11 LAN-to-LAN tunnel to headend device 193.P.Q.R disconnected: duration: 0:00:49
and from router side I See this with show crypto isakmp sa
131.A.B.C 193.P.Q.R CONF_XAUTH 5 0 ACTIVE
but the status got stuck in CONF_XAUTH state and then disconnects?
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Jul 15, 2012
My router is Cisco 2811 with IOS version 12.4(22)T1. It had established IPSec with another peer (203.*.*.250 shown below) for long until recently we make it re-establish IPSec VPN with another peer (203.*.*.30 shown below). It showed that the new sa is active but the result still showed there were 4 deleted SAs. The 4 obsolete sa entries won't vanish no matter what I do i.e. reset the interface, re-create crypto map, clear all sa and etc.
From numerous testings we knew that the VPN doesn't work even the desired sa is there remaining active. I reckon it has something to do with those deleted sas ( i mean it is supposed to show only the last one if it is working fine ). I don't know how it would be come like this as we did pretty much the samething on other VPN routers with no problems.
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Aug 30, 2011
setting up IPsec for a DMVPN between a 2811 and 2951s in a test lab. I have enabled IPsec on the hub (2811) but I am unable to do so on either of the 2951s. After researching, it seems that I may have the incorrect IOS for this, but I am at a loss which IOS I should be using. Currently the 2951s are on "c2951-universalk9-mz.SPA.151-2.T2.bin" and the only crypto options are(config)#crypto ?
ca Certification authority
key Long term key operations
pki Public Key components
while on the 2811 I get:
WIN-T(config)#crypto ?
ca Certification authority
call Configure Crypto Call Admission Control
ctcp Configure cTCP encapsulation
dynamic-map Specify a dynamic crypto map template
engine Enter a crypto engine configurable menu
gdoi Configure GDOI policy
[code]...
These are all hand me downs?
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Apr 25, 2011
We are trying to sniff traffic in one of our routers 2811 IOS 12.4(3f) capturing data into the flash memory and tftp later to one of our servers. We had followed the command procedure as it is indicate in Router IP Traffic Export Packet Capture Enhancements doc but it seems that the mode capture option is not alllowed in my router. My question is Why? I had read the doc and the hardware and software should support this feature.
ROM: System Bootstrap, Version 12.4(1r) [hqluong 1r], RELEASE SOFTWARE (fc1)
yourname uptime is 2 weeks, 4 days, 22 hours, 14 minutesSystem returned to ROM by power-onSystem image file is "flash:c2800nm-ipbase-mz.124-3f.bin"
Cisco 2811 (revision 53.51) with 251904K/10240K bytes of memory.Processor board ID FCZ104174196 FastEthernet interfacesDRAM configuration is 64 bits wide with parity enabled.239K bytes of non-volatile configuration memory.62720K bytes of ATA CompactFlash (Read/Write)
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Apr 6, 2011
I am having some trouble with one of our servers at work. Basically it won't allow any TCP/IP connections as the IPSec driver has entered Block mode. I have been advised by our external IT support (I can't get hold of him at the moment, that's why I am here ) to go into the command prompt and type: regsvr32 pdstore.dll but when I do this is can't find the file.What is pdstore.dll as when I Google this it comes up with nothing, so is this the correct command?
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Aug 18, 2011
I have a asa and Cisco 2811, needs to build a site-to-site ip sec tunnel between them. Due to a requirement need to encrypt inside traffic, i need to apply on the inside interfaces on both devices to build the tunnel.
I don't see a problem but just want to check if it would work on terminating on Inside interfaces on both ip sec peers.
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Dec 18, 2011
What does a firewall block at the transport layer?
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Feb 7, 2013
I have "transport local ssh" but its still allowing telnet??This is a 2960 switch Here is the end of running config:
Code:
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Apr 28, 2011
Geting this message, having low performance and overrun errors Apr 29 13:45:59 pix-servidores %PIX-4-500004: Invalid transport field for protocol=TCP, from 188.120.243.238/80 to 174.56.110.0/0
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Sep 23, 2012
I'm in process of purchasing a new Cisco routers for our branches that will be used primary to enable IPSec virtual tunnel interfce with "tunnel mode ipsec ipv4". does the default IOS IP Base supports this feature? or i need to purchase DATA license or SECURITY license?
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Dec 28, 2011
you can configure a cisco 1905 router with vpn ipsec site-to-site in an aggressive mode? If so, any link to what I do? The VPN works well, but on site A, I had to configure a crypto map associating the IP address for site B (wich is dynamic), so if the connection on site B broken, I will have to configure another crypto map.
The scenario is:
Site A - ASA 5510 configured as a VPN concentrator and firewall for enterprise.
Site B - Cisco 1905 connected to Internet through a ADSL through a dynamic IP address and starting connection to Site A, bellow is the configuration:
crypto isakmp policy 10
encr 3des
hash md5
authentication pre-share
group 2
crypto isakmp key xxxxxxxxxxxx address W.X.Y.Z
[code]....
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Jun 22, 2012
I have a Linksys E2000 router & a HP Officejet 6500A PLUS all-in-one printer. While printing, at a certain moment, the printer stops printing, rolls the sheet out & act like nothing happened. But, when i use an adhoc connection, the printer works just fine. So i think there has to be something wrong on transport (router?)
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Dec 14, 2011
This network has a peer network with a mixture of Win 7, Vista and XP computers. The network problem I am having is with an XP computer that was able to access network shares on a Win 7 Pro (64-bit) computer yesterday, but cannot today. I tried repair steps that have worked for me in the past, but didn't today.
1. Rebooted.
2. Turned off Windows Firewall.
3. Re-ran the Network Setup Wizard and select turn on file and print sharing.
4. Changed IP configuration to choose NETBIOS over TCP/IP.
5. Uninstalled AV software.
Error Messages that I have been receiving:
1. When attempting to connect to a share on Win 7 PC: "Microsoft Windows Network: The specified server cannot perform the requested operation. The connection has not been restored."
2. When trying to view the computers in the workgroup: "Workgroup is not accessible. You might not have permission to use this resource. Contact the administrator of this server to find out if you have access permissions. The specified server cannot perform the requested operation.
3. When using the command, "NET VIEW" from the command prompt: "System Error 58 has occurred.
4. Event Log: Browser error 8032. The browser service has failed to retrieve the backup list too many times on transport DeviceNetBT_Tcpip_{06ECF93A-1B89-4FF4-923E-F3302EF95FE1}. The backup browser is stopping.
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Feb 14, 2013
I have a 2811 that I can remotely VPN to using Cisco VPN client however I cannot see the internal admin network (10.35.5.0).
Current configuration : 4845 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
[code].....
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Jan 10, 2012
Between our hosting and a customer we have an extended vlan, traveling on a fiber, between two cisco 3560 switches.The thing is, that we want to create one or more vlans inside that extended vlan, in some way if possible?
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Sep 7, 2012
I intend to deploy a voice+data network using some old 3745 and 2811. The network in effect has six 3745 in a hybrid topology at different locations and each having three WIC-2T, one WIC-4T, three NMHDV-2E1. That's pretty much juicing out the maximum from these routers These will serve as my core routers and for access I will be using my 2811s with more VWICs and lesser WIC-2T to give voice and data to subscribers. The 2811s will have links to multiple 3745s. The NMHDV-2E1 will serve for the voice needs at the 3745 locations. All the WAN links will be E1. All my telephones will be on analog voice using traditional EPABX with CEPT/ PRI E1 cards for connecting to the routers. And for data, ethernet ports.Two of the routers will have E1 links to the PSTN and Internet which has to be extended to all my folks. Now, for the tricky part, all my network modules are refurbished stuff from ebay and all the ports will have links on them. I intend to use OSPF with only the backbone area.
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Sep 14, 2011
I have a Cisco2811 SRST/K9 router with a four port FXO that is part of our phone system. It won't ping to anything on the network except for one particular switch. I can ping that switch (but nothing else) and that switch can ping the router and telnet into the router; however, when I plug the router into any other switch on my network, it will still only successfully ping that one switch. It won't ping the switch that it's physically attached to. I can see the router from the switch when I do a Show CDP Neighbor. And I can see the switch when I do a Show CDP Neighbor from the router. But it won't ping. When I do a Show Adjacency from the router, it returns only that one switch. I've tried a Clear ARP on both the switch and the router. I've also compared the config from the router to the config of a working router on the network and everthing looks the same. I can ping anything on my network from these switches - except that router. I even tried changing the default gateway of the router to be the ip address of the switch with which it can successfully communicate.
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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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May 15, 2013
We are facing network heavy and slow performance at one of our remote site, we are using Cisco2800 series router with same IOS on either of the sites.Our WAN network is running on BGP with EIGRP configured and tunnels were configured on either of the sites. As part of the testing I have removed the tunnel to see the performance was ok from Head office to remote branch and the WAN network is getting heavy and slow down when we put the tunnel back in hub and spoke.
quick info
Cisco 2800 Series router
IOS: (C2800NM-ADVIPSERVICESK9-M), Version 12.4(15)T1, RELEASE SOFTWARE
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Dec 14, 2011
i have question about router 2811, for now, all HWIC in 2811 is full,
Slot 0 : VIC2-2E/M
Slot 1 : VIC2-2E/M
Slot 2 : WIC-1T=
Slot 3 : HWIC-1FE
But we need add more 2 module VIC3-2E/M. can we use Network Module ? example : add one NM-HD-2V + two VIC3-2E/M ?
Can we do that? and whether it is the same as we use the VIC2-2E / M on HWIC slots
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Aug 7, 2012
how we can select a network module for 2811 router?gigabit or ethernet Hwic?
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May 24, 2012
I have to configure router 2811 for Data and Voice network.However I have only one Fast Ethernet interface. [code]
what else do I need to configure on switchport on which Avaya phones are connected.And is there any extra command, i need to configure on the router and 2950 switch.
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Apr 29, 2013
I tried any type of combination and just couldn't make it works. Only PPTP works well. Whether Apple iOS IPSec VPN is supported or not?
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Jan 7, 2013
We have Cisco 4500 device having GRE tunnel and next HOP is ASA is doing the IPSEC VPN over WAN.So this type of Network is called as GRE over IPSEC right? Also when i do on 4500 sh int tu0
Need to understand this shows Data transmitted over GRE tunnel which is not encrypted right? To check data transmitted by ipsec ASA which is encrypted we can do sh crypto isakmp sa right? Where we apply crypto MAP here on ASA physical interface?
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