Cisco WAN :: 3800 - Internet Key Exchange (IKE) Aggressive Mode

Jan 16, 2013

Need the clarity on IKE version 1 with aggressive mode, I assume this is used for remote site VPN and not for site to site VPN.

Correct me I am wrong and also share the inputs on this.

Also required the inputs for disabling in Cisco 3800 series router.

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Cisco VPN :: ASA And Aggressive Mode In ASR 1002

Jan 8, 2013

I have Cisco ASR 1002, code XE 3.4.1 doing site-2-site VPN with an ASA managed by another company that I have no control over running 8.3 (I think).the site-2-site vpn is very easy straight forward as follows.

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Cisco WAN :: C800 / Aggressive Mode Tunnel On ASA5505?

Jun 13, 2011

Currently, I have in a number of remote sites (with dynamic public address) a C800.On this Cisco, I have a config for initiating an agressive-mode tunnel to a central ASA.relevant part of the config:

---
crypto isakmp policy 10
encr aes
authentication pre-share
group 2
!
crypto isakmp peer address 1.2.3.4

[code].....
 
Now I need to replace these C800 by ASA5505. But I don't know how to replace the "crypto isakmp peer address" command in ASA.The C800 transmits both the password (abcdefg in my example) and the fqdn (remotesite1 in the example). how to configure the ASA to build the tunnel the way the C800 did?

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Cisco Routers :: SRP527w IKE Aggressive Mode Remote ID Cannot Be Set Manually

May 18, 2012

I've found an issue with my SRP527W that is prohibiting me setting up a useful site to site VPN.  In short, the "Enable ID: Default/Manual" option in the IKE policy screen does not seem to behave as advertised.  Not matter what it's set to the remote end always ends up receiving the IP address of the DSL interface as its peer id.
 
The scenario is an SRP527W with a dynamically assigned DSL IP address connecting to a Netscreen SSG5 on a static IP.  I have confirmed that:

- A Main Mode VPN works (but is no use on an ongoing basis due to the dynamic IP)

- An aggressive mode VPN works if the Netscreen has its peer ID set to the public IP of the SRP (....same dynamic IP issue)
 
However if I try to set a manual Remote ID in the SRP IKE Policy it does not get sent as part of the phase 1 negotiations.  Debug logs on the Netscreen shows that it receives the DSL public IP no matter what.
 
Dumping the router config to XML [URL] shows no sign of the IP address that has been set via the interface (despite the setting visibly staying set in the interface).  The rest of the VPN config shows up there.
 
Current firmware version: 1.01.26  (003)

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Cisco :: 3825 - Unable To Establish VPN Session With Aggressive Mode Disabled

Jun 6, 2011

I am trying to diable aggressive mode, for security reasons. I have a Cisco 3825 running c3825-advsecurityk9-mz.124-24.T2.bin. When I disable aggressive mode with  ROUTER(config)#crypto isakmp aggressive-mode disable , I am unable to connect. The syslog message displayed is > %CRYPTO-5-IKMP_AG_MODE_DISABLED: Unable to initiate or respond to Aggressive Mode while disabled  and the client error is Reason 412: The remote peer is no longer responding.

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Cisco VPN :: IPSec Site-to-Site Aggressive Mode On 1905

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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Cisco VPN :: ASA5515 - Site To Site Using Aggressive Mode

Jul 1, 2012

We have an ASA5515 at HQ and multiple sites with ASA5505 units. All of these units are connected via site to site VPN in mm. They also have static ip's.mwe have two sites that we are currently attempting to connect back to HQ in aggressive mode but are unsuccessful.

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Cisco WAN :: 3800 - Failover Internet Traffic Router

Mar 27, 2013

I wanted to configure failover internet between two routers Cisco 3800 Series. Each router is connected to an ISP. I have configured HSRP protocol on my interfaces and my HSRP configuration works well. I want to configure my routers to switch my internet traffic in case of failure. For example,if the first ISP internet connection fails, traffic will switch at the second ISP. I want to know how I should proceed to do this.

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Cisco Switching/Routing :: C4500 - UDLD Normal / Aggressive With Multiple Neighbors

Aug 20, 2012

we're running 4 c4500 Switches at 2 sites connected to each other via Layer-2 crypto boxes and VPLS in a point-to-multipoint configuration which ist completely transparent (it's more or less like connecting them via a Hub - every switch sees the other 3 ones as neighbors). Our basic configs have udld globally enabled in aggressive mode. I wanted to disable that for the interfaces (routed ports) to the crypto boxes, because I don't want them in ErrDisabled for 5 minutes if there are connectivity problems in the VPLS-cloud (every switch also had 3 UDLD neighbors because of the P2MP configuration). In if-config mode I could do this simply with "udld port disable", but I thougt it would be better to run normal mode (not aggressive) to have the chance to use the UDLD show-commands. So I configured "udld port" for the affected interfaces.
 
interface GigabitEthernet1/2
udld port
!

[Code].....

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Cisco WAN :: How To Configure 3800 With WIC-2AM-V2 To Do DDR

Sep 30, 2012

I'm trying to configure a Cisco 3800 with a WIC-2AM-V2 to do DDR.  I've gotten it to work before, but it was a while and now the config doesn't seem to work.  I'm using an Lo0 interface and ip unnumbered on the Dialer interface.  Using debug dialer and debug ppp and see nothing at all trying to dial out.
 
##############################################################
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname DDR

[code].....

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Cisco WAN :: 3800 As NTP Server

Sep 1, 2011

I am trying to configure cisco 3800 as NTP server for all Juniper MX router clients. Purpose is to server the clock to all Juniper routers. But i m facing weird issue.. All Juniper routers are getting synch with Cisco 3800 but there is difference of 30 min between client and server time.
 
Cisco config
 
ntp authentication-key 100 md5 11201D00163B0C1E 7
ntp trusted-key 100
ntp source Loopback1
ntp master
end

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Cisco VPN :: 3800 - VRF And Static Nat

Jun 12, 2011

I'm having a problem on which i cannot find an answer. I have a VPN router 3800 series (DMVPN) with 2 VRF on it, we also use dual Nat to reach our data center behind the 3800 series isr.
 
I created the Nat rules and the acl's , but the Nat is just not working, is there a special configuration needed for Nat and VRF's?

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Cisco :: L2L IPSec Tunnel - ASA To 3800 Router

Mar 3, 2011

I have been struggling for a few days with getting site-to-site traffic working across a L2L IPSec tunnel. At this point, I have the tunnel up, and I see packets being decrypted on the correct IPSec SA's when I ping from a local network computer on the ASA side to a local network computer on the router side. I cannot ping from one side to the other, but those packets are getting through. We have another L2L tunnel that is from that ASA to another remote site's ASA, and that is functional. I have mirrored the configuration for ACLs, etc. from that site, so I believe that the issue is with the packets getting incorrectly translated by the NAT/NONAT statements/ACLs on the router side.

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Cisco WAN :: 3800 No Service Password Recovery

Sep 26, 2011

I was just configured a 3800 router with this command. I cannot get to the ROMMON mode anymore. Cisco says you should press Break key within 5 seconds after the image decompresses during the boot. But mine is ignoring it and going to load running config directly.

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Cisco WAN :: 3800 Router Flash Upgrade?

Jul 14, 2012

I need to upgrade compact flash memory card for a 3800 router. Basically i want to upgrade code on this router and the current flash size (64Mb)  cannot hold new image. I wanted to check if i swap the old flash (64 Mb) with a new one 256 mb, i will loose vlan.dat file since it's stored in flash. Is there a way i can copy vlan.dat to new flash which has new code before i change the boot statements and reload the router?

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Cisco WAN :: 3800 Series Behind A Cable Modem

Dec 22, 2010

I inherited a 3845 router. I am hopeful that I can use it for my home practice lab and connect it to a Cablevision (Optimum Online) Cable Modem. If it is possible what interface card/config I would need? It currently has a T3/E3 card with 2 coaxial connections (was used with a Cogent DS3 connection). I'm guessing I would need to replace it with an Ethernet one (?). Granted - I suspect it may cost a pretty penny, nonetheless I'd like to look into it.It also  has 2 dual-port vwic2-2mft-t1/e1 card installed. I am an absolute beginner with Cisco and networking.

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Cisco WAN :: ME 3800 Ten Gigabit Interface Not Showing

Dec 10, 2012

I am using a Cisco ME 3800 switch with 24 Gig and 2 Tengigabit interface. But after configuring the Tengig int with ip add and negotiation it is no know visible in the switch. Instead TenGig I am seeing two (Gi0/1 and G0/2). Not even showing the Tengig in the running config.

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Cisco WAN :: 3800 - Nest QoS With Shaping - Getting Drops

May 4, 2012

I have a 3800 running 12.4 with a outbound shaped nest Qos tied to a subinterface G0/0.12 which is trunk downstream to a 3500. I am getting drops on the "sh policy-manager inter g0/0.12 so know that shaping which is 1.5mbps is dropping my packets. The 3500 looks clean
 
3800: 
policy-map A
class-map A
bandwidth 30% etc..

[Code]....

the routing is that host goes up to the 3800 and out a wan link but if wan is down, it hairpins back down from 3800 to 3500 which has a backup link on one of the ports. when we test wan down, or even when it is up, I see shape dropping packets

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Cisco WAN :: 3800 / Traffic Shaping When QoS / CoS Employed?

Nov 19, 2011

I have a client who has Cisco 3800 series routers in their data centre with which they have QoS/CoS policies implemented. They wish to further manage traffic by limiting outbound traffic to their branch sites in line with the network access bandwidth each site has available. Is this possible whilst leaving the QoS policies in place? If so how?

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Cisco Infrastructure :: See Network With NAT On 3800 Router?

Jul 10, 2012

Is there a way to be able to check from one computer on a network to another computer on the same network when both have been set up with NAT?
 
For example, computer 10.0.0.10 cannot ping 10.0.0.20 because NAT has been set up. Port forwarding does not seem to be an answer. Is it possible for NATted computers to be able to ping each other or not?

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Cisco VPN :: L2L IPSec Tunnel - ASA To 3800 Router?

Mar 2, 2011

I have been struggling for a  few days with getting site-to-site traffic working across a L2L IPSec  tunnel.  At this point, I have the tunnel up, and I see packets being  decrypted on the correct IPSec SA's when I ping from a local network  computer on the ASA side to a local network computer on the router side.   I cannot ping from one side to the other, but those packets are  getting through.  We have another L2L tunnel that is from that ASA to  another remote site's ASA, and that is functional.  I have mirrored the  configuration for ACLs, etc. from that site, so I believe that the issue  is with the packets getting incorrectly translated by the NAT/NONAT  statements/ACLs on the router side. 

The ASA is: Cisco Adaptive Security Appliance Software Version 8.2(2)Hardware:  

ASA5520, 512 MB RAM, CPU Pentium 4 Celeron 2000 MHz The router is:Cisco IOS Software, 3800 Software (C3845-ADVENTERPRISEK9_SNA-M), Version 12.4(20)YA3, RELEASE SOFTWARE (fc2) Router Config:!version 12.4!card type t1 0 0!no ip cef!ip multicast-routing no ipv6 cef!crypto isakmp policy 10 encr 3des authentication pre-share group 2crypto isakmp key xxxxxxx address nn.nn.12.130!crypto ipsec security-association lifetime seconds 86400!crypto ipsec transform-set 3DES-SHA esp-3des esp-sha-hmac !crypto map NOLA 11 ipsec-isakmp set peer nn.nn.12.130 set transform-set 3DES-SHA set pfs group2 match address VPN-ACL!controller T1 0/0/0 fdl both cablelength long 0db channel-group 1 timeslots 1-24!interface Loopback0 ip address 1.1.1.1 255.255.255.252 ip virtual-reassembly no ip route-cache crypto map NOLA!interface GigabitEthernet0/0 no ip address duplex auto speed auto media-type rj45!interface

[code]....

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Cisco WAN :: 3800 Series To Reset The Password Of Router

Jun 27, 2012

I have Cisco 3800 series router it needs user name and password to access through terminal I don't have the user name and password. Need To reset the password.

Terminal screen shot is attached here you can see that.

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Cisco WAN :: Adding Another 3800 Router To An Existing Setup?

Feb 26, 2013

I have a working 3800 router which runs on bgp pretty well. Existing setup has 2 serial ports for the bgp and 1 gigabit port for the LAN.Now, i want to add another 3800 as a standby router making it clustered - ACTIVE/STANDBY via hsrp protocol.
 
1.) What are the implications in adding another 3800. Do i need to reconfigure the ip addresses on my serial? or just the LAN
 
2.) Are there any additional requirements like firmware versions etc?

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Cisco WAN :: Debugging SIP Voice Calls On 3800 Router?

Oct 24, 2011

We're having some numbers ported over to us and we'd like to verify that we are in fact receiving all of the numbers at our SIP gateway.  Since we have been getting more and more activity on this router, I'm becoming more concerned about using certain debug's for fear that the router maxes out CPU and drops.
 
What the best debug command would give me this information with minimal impact on CPU?  In the past I've used 'debug ccapi inout' and a couple of others similar to that.  With so much activity though sometimes it bombs the router.  Also I am logging to the console directly, maybe there is a better method with less CPU impact.  I just don't want to have to go back and forth to look for stuff 50 times either if I write out to a file or something, it could work though I suppose.

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Cisco WAN :: 3800 - HSRP Can Track Multilink Interfaces?

Feb 6, 2013

I have two Cisco Routers 3800 series for my internet traffic (2 ISP). I configure HSRP on the interfaces gigabitethernet and at the main router I put the multilink interface to track. When the connection drops to the main router traffic does not switch on my second router.

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Cisco VPN :: Lan To Lan Dynamic VPN With IPSec And QOS On Physical Interface 3800

Feb 3, 2011

I have a network with Two 3800 Cisco Routers as Central and many Cisco 2811 Router as Branches. Now I set two Tunnel on each router connection Interface FastEthernet from each 2811 to SubInterface Fastethernet on 3800. I set OSPF as Routing Protocol and I configure QOS on Tunnel connections. Then I have a safe connection with backup connection between 3800 Router and each 2811 Router. Now I want to set VPN with IPSEC and Certification Authentication with CA Server for Security all connection. I set IPSEC and ISAKMP and Certificate on each Router and Set Dynamic VPN on Cisco 3800 Router and Static VPN on each Cisco 2811 Router. Now when if I configure tunnel with Crypto map, it works correct and all packets are encrypt. But if I try to set crypto on physical Interface(because I want to set qos on tunnel then protect packets on physical interface) however all packets are routed but crypto and encrypt d o not work. Set qos on tunnels and crypto on fastethernet interface.

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Cisco Switching/Routing :: 3800 Couldn't Add More Rules Into Some Of ACL

Jan 17, 2013

I have a question about ACLs on Cisco 3800 router. I tried to configure extended IP access-list. However, I couldn't add more rules into some of the ACLs when the number of rules increase to about 120 rules. These extended IP access-lists are assigned to gigabit ethernet interface and sub-interface (VLAN interface).
 
Is this caused by some kind of maximum number of rules supported?

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Cisco WAN :: Verify Optical Power Level In SFP Inserted In 3800?

Sep 14, 2012

I have a Cisco3800 with IOS Version 12.3(14)T2 and I have an HWIC-1GE-SFP module inserted on it.    
 
I need to know if there is a command to verify optical power level in this module inserted in the Cisco 3800 router?
 
Something similar to the following command that I can execute in an Cisco ASR9K:
 
show controllers Te0/0/0/1 phy | i Rx

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Cisco Security :: Tunnel Mismatch Between A PIX 515E Version 7.2(2) - 3800 12.3(11r)?

Mar 11, 2007

I have a tunnel between a PIX 515E version 7.2(2)and a Cisco 3800 version 12.3(11r). There is a mismatch somewere in the configs but I cannot find it. I have included the configs and the syslog errors.

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Cisco WAN :: Setting Up IPSec Tunnel Between 3800 And 2600 Routers?

Jan 19, 2013

I'm setting up a IPSec Tunnel between 3800 and  2600 routers over the internet.
 
Do I need to create a tunnel interface as they suggest in this document?  [URL]
 
I just watched a couple of you tube videos saying I don't need to do that...

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Cisco Switching/Routing :: Command To Check Memory Slot In 3800 Routers?

Nov 13, 2011

I remember there is one command which can tell you which memory slot has how much big memory in Cisco 2800 or 3800. But at this moment, I just couldn't recall this command. I checked "show diag" but didn't see any information about memory.

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Gateway 2wire 3800 HGV-B Router - Wireless Working Properly But Wired Isn't?

Jul 22, 2012

I've got a Gateway 2wire 3800 HGV-B router which works fine wirelessly, but when using an ethernet cable to connect to the internet, it doesn't even recognize the computer. My laptop runs wirelessly all the time, and I recently picked up a desktop PC for home here, and it's the first wired connection I'm using, but for some reason the wired connection isn't connecting to my network, but instead it's own Unidentified Network.

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DNS For Exchange Server?

Apr 13, 2013

I am new to Exchange Server 2007 . I want to know that in order to implement Exchange Server do I need to register Domain name like [url]... ? OR A FQDN of Active Directory can work.Is it compulsory to register domain ?

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