Cisco WAN :: IP SLA544 Using With Loopback
Feb 17, 2011
I am facing issue with using IP SLA544, I am given a project in office and need to implement policy based routing,for some reasons i want to use loopback for it.I have 2 routers A and B, I just want if traffic from 216.0 network comes on A set next hop to routers B looback interface. Can i do it? its working fine with physical interfaces but not with loop back. This loop back is reachable and from router A if i telnet the loopback IP of B it actually gets me to Router B as well.
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Feb 15, 2013
How can we manage ASA in GNS3 through ASDM? And How to install image for IDS in GNS3?
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Oct 29, 2012
I have a setup with a few sites that have layer three switches behind firewalls. I've been successful in setting up GRE tunnels between all the layer three switches, the GRE traverses IPsec which goes between the firewalls at each site. That way, the GRE is encrypted over the Internet and I don't have to deal with protocol forwarding and stuff. The GRE tunnels are terminated at the loopback addresses of each layer three switch, this works well for the most part, except that I need to put static routes for each loopback address in each switch to point via the firewalls, because when OSPF comes up over the GRE tunnels it starts advertising the loopbacks, and as such the switches think they can get to them over the GRE (which is built from the loopbacks to begin with), as you can see, sort of a catch 22. The static route method works fine, but it makes it so that I can't access the loopback address for monitoring/management purposes from any other sites on the basis that the local core tries to send it directly to the firewall rather than over the GRE tunnel. Is there any way to force only the GRE traffic out via the firewall while letting any other loopback-destined traffic go over the GRE? I'm thinking this could be done with a properly-matching route-map, but I'm not sure where I would apply it, could I apply it directly to the loopback or would the GRE traffic skip that on the way out?
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Feb 24, 2011
I have 2 ASA 5505, with a site-2-site vpn, I need to reach a server on network A on port 7887 from Network B.The 2 boxes are both on a public net and has a private net inside.When initiating a telnet session from a Host on network B, to a ip 172.210.210.56 /24 (which is defined as my remote network in the connection profile)I can see the trafic arriving on the ASA on network A, but the trafic gets rejected with the following.
Built local-host outside:VPN-TEST_172.210.210.5602: VPN-TEST_172.210.210.56 7887 Teardown TCP connection 398765 for outside:VPN-TEST_x.x.x.x/16698 to outside:VPN-TEST_172.210.210.56/7887 duration 0:00:00 bytes 0 Flow is a loopback03: Teardown local-host outside:VPN-TEST_172.210.210.56 duration 0:00:00.I'm a newbee with the ASA 5505, and connot figure out why this is a loopback ?
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Jan 28, 2013
I've got some 1941 ciscos set on every branch.We have native L2 between this offices and I want to use external ip addresses on gig 0� interfaces anfdf local ip addresses on lo 0 interfaces, and use lo 0 for vpn connections.
I do:
int gig 0/0
ip add 192.168.181.14 255.255.255.0
ip nat outside
I can ping it from local network behind giga 0/1 but i can't ping it fro outside, how can i do this?
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Jan 4, 2011
I have a cisco router 2811 connected on other two routers but can't ping any of them from any of them too (frame-relay encap correct) DLCI mapping ok all ip configured only router 2 's line protocol is up the rest is down on others and seems LMI sent are not receive and do know how correct that
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Dec 10, 2012
I would like to be able to use NAT loopback on a Cisco EPC3925 so that I can refer from my iPad to the webserver that is located on my iMac on the same LAN by using the external site name. Is that possible and if so, how can I configure the router?
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Sep 11, 2012
I have a cisco 2821 and have configured a llopback address which I want to use for management, however, I am unable to ping it from a device attached to GigabitEthernet0/0
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Jun 22, 2011
I am working at a client site today. The client has a large Frame Relay Hub Spoke network. The Hub is at the HQ location, and then there are about 15 spoke sites in remote offices.
We are having an issue with the frame between the HQ and one of the spokes. We are currently working with our dear friends at AT&T to troubleshoot the issue. AT&T yesterday was trying to run a local loop test to the router at the remote (spoke) end. We were working iwth them in trying to put the remote router (which we manage) into a loopback mode. We were trying to use controller commands
COOP-Rappahanock#conf t
Enter configuration commands, one per line. End with CNTL/Z.
COOP-Rappahanock(config)#controller ?
% Unrecognized command
COOP-Rappahanock(config)#controller
That we seem to run out of options...
How can we put the subinterface that is the other end fo the frame into loopback mode so that a local loop test can be done between us and AT&T (provider)?
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Jun 16, 2013
This is one of the standard issue vodafone routers. So i set up web-server on my laptop, and it is accessible to the internet now.
However I need to be able to access it from my machine using the public address. But I just cannot find where to enable nat loopback. I looked for options in both regular and advanced user logins (web interfaces). So I suppose the last option is telneting into it, and using commands to do it.. but I don't know how to access it (cant find the credentials). URL
In above link it says that i can find this info in configuration file, but how to access it?
And then what commands should I use to enable the NAT loopback?
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Apr 16, 2013
I have a router asr1002 and I need that my loopback interface will be accessible from internet ISP adderss space I have
46.xx.x.64 255.255.255.192
interface TenGigabitEthernet0/2/0.301
description -=ISP=-
encapsulation dot1Q 301
ip address 46.xx.x.66 255.255.255.248
[code]...
packets transmitted 9received 0packet loss 100 %time 8063 ms
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May 25, 2013
I wonder if there is no any issue when we are using one loopback interface as source address in case multiple GRE tunnel.However, the destination IP address different per each tunnel, only having same source loopback.
for example),
interface loo0
ip address a.a.a.a 255.255.255.0
!
interface tunnel 10
[code].....
I saw warning message when I apply 2nd GRE tunnel on C7613, SRD6 IOS. we have a plan to enagle one more GRE tunnel in same.I need to decide to use adding one more loopback IP or just use this with ignoring warning message in terms of configuration easily.
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Feb 25, 2013
In my home network, I have a Synology. It has 10.0.123.123 as local IP address on my local network and it can be accessed by internet with the dynamic domain name.So when I'm home, I have to use 10.0.123.123 to access it, and when I'm away, I have to use trucmuche.diskstation.me.Would it be possible to configure the EA3500 to redirect the domain name "trucmuche.diskstation.me" to 10.0.123.123 when I use the domain name inside my home ?A friend told me that I had to configure "loopback" but I don't know how..
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Feb 24, 2013
I have a Windows 7 64 Bit machine, and I cannot find a way to disable the IPv6 Loopback. I looked at the article at How to disable IP version 6 or its specific components in Windows and shows how to set HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesTcpip6ParametersDisabledComponents to various values – but none of these seems to disable IPv6 Loopback. I attempted setting this value to 0xffffffff and 0x20 – restarting my computer after each change, and I still do not get this disabled.
I am using another software called Webdriver or Selenium that gives errors when debugging if IPv6 Loopback is not disabled. It seems to attempt to connect to [::1]:7055 and fails. Is there a way to force it to connect to 127.0.0.1.
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Mar 29, 2011
how do I telnet to remote devices from nexus 7000 with source interface as loopback 1?
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Nov 14, 2012
I purchase new router EA6500 for fiber optic network 100/200 (my old WRT56GL is too slow for this speed). Now i have big problem with NAT Loop back - didn't work. How can I corrected this error. All other services work OK. I need this function for my mail server and web server on my firm) - now I can't connect from local IP to my mail server and read messages. Firmvare version is 1.1.27.144730.
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Apr 3, 2013
Region : UnitedStates
Model : TD-VG3631
Hardware Version : V1
Firmware Version : TD-VG3631_V1_130108
Does this modem support NAT Loopback? I can't get it to work.If so, why not, can we have a firmware that supports NAT Loop back?
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Jun 5, 2012
I have a Cisco CBS3020-HPQ chassis switch running IOS 12.2.(25r)SEF3. One of the ports is in "disabled" state but when I try to unshut it, it doesn't work, the switch logs shows the following event:
%PLATFORM_ENV-3-LOOPBACK_PORT_POST_ERR: Gi0/1 can't be brought up because it failed POST in Loopback test
how do I resolve this, the port is unusable since I can not get it out "disabled" state.
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Mar 10, 2013
When can we have an upgrade to include 'Lookback' function for Virtual Server ? I understand both Build-120802 and Build-120926 does not support this Loopback feature. Without the loopback feature, we won't be able to test out Dynamic DNS URL is working or otherwise on local PC.
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Mar 7, 2013
Region : UnitedKingdom
Model : TL-WDR4300
Hardware Version : not clear
Firmware Version :
ISP : BT
I am thinking of buying a TL-WDR3600, but just need to know the answer to the question below.Can anyone confirm if the TL-WDR3600 supports NAT Loopback functionality?
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Sep 26, 2012
I have an Ethernet Loopback Plug (4 Pairs) made and trying to test the Gigabit Interface on a 3845 Router with a fail result. The interface will show up/up only if I set the interface to 100M/Full Duplex when I plug-in the Ethernet Loopback Plug (4 Pairs). I don't see this Gigabit Interface @ 3845 router has any option to set it to internal or external loopback.
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Oct 31, 2011
I share a modem and router with my building, and connect to the internet using an ethernet cable which plus right into the wall in my apartment. When I hover over the network/internet icon it tells me that I have a local connection only and can't get online. No changes were made to my computer between it working and not working - I have not installed any new software and the modem+router have not been changed.
When I try ipconfig/release is says it can't perform the operation while the media is disconnected. It also tells me that "an error occurred while releasing interface Loopback Pseudo-Interface 1: The system cannot find the fie specified".
[code]...
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Jul 20, 2011
I'm trying to test fast roaming using a Cisco 2100 Series controller and 2 1140 APs. The initial authentication succeeds fine and the wireless connection works ok using WPA2+CCKM and LEAP with a Cisco ACS radius server.The problem is that the client does not attempt to preauthenticate with the other AP because the RSN Capabilities IE in the AP beacons and probe responses do not set the RSN Preauthentication capable bit. I can't figure out what it takes to get the APs to indicate to clients that it can do preauthentication. I'm been crawling through all the documentation I can find, to no avail.
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Aug 22, 2011
We are about to share a 10 MBit ISP connection with 2 others companies, and they are going to split the bill up into 3,3 and 4 Mbit, so we where thinking that we could setup a switch before their and ours router and provide them with a static IP from our ISP. But is it possible to set a bandwidth limit on the ports of a Cisco Catalyst 2960-8TC, so that we can set a limit of 3,3 and 4 on 3 ports.
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Dec 3, 2011
I want to PAT my project of WLAN and i attached the document, how I create the Testing Criteria of the said scenarios, PAT document includes WCS 7.0, WLC 5508, MSE 3310, Cisco AP 3502e and ACS 4.2.
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Jul 12, 2012
I have cisco ASA5510 firewall using in my network but unable to bolck Url's unwanted. can i block the [URL] on the asa by using regular exp.
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Mar 1, 2012
I have 7 POE switches that have ESI IP phones attached. I have two VLANS, 1 and 2. VLAN 2 is used for voice and is defined in each switch.The ESI IP phones connect to my POE switch ports and the pc attaches through the ESI IP phone.
I have had voice quality issue between floors in my building. Talking to others on my floor via the IP phone, there are no voice quality issues. [code]
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Nov 18, 2012
is it possible to connect Cisco Ap-1242AG with non-cisco wireless router to work as repeater?
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May 1, 2012
I am looking at a config on a 5550 FW, and am trying to make sense of the syntax of the following rules. I have been to the Cisco site, but can't find much on the syntax.
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Mar 10, 2011
I currently use a device called the Access Enforcer which runs OpenBSD. I have 3 stable, working VPN tunnel's where the other side's device is a Cisco ASA 5520 or 5540. I was setting up my 4th VPN where the other side used a Cisco ASA 5520 and ran into issue's. The Cisco side can bring up the tunnel. Once the tunnel is up each side can talk to the other side. However, when the tunnel is dropped, the OpenBSD side cannot bring up the tunnel. The error received is on the OpenBSD device is "isakmpd[29581]: transport_send_messages: giving up on exchange from-XX.X.X.0/24-to-XX.XXX.XXX.240, no response from peer XX.XX.XXX.141:4500". I have been trying to figure this out for weeks now and can't seem to find the cause.
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Dec 5, 2011
I am trying to configure a 3750G that has been sitting on the shelf for several months and am getting the following error -
% Error: Unable to create flash:/microcode_update% Error: It must not already exist
Normally, getting an error during POST isnt a good thing. My first thought was that flash was corrupted or flagged RO somehow. I did fsck flash: with no change. I next tried fsck /test flash:. It tested 77 blocks and performed 0 erasures. It had been running for about 15 minutes with no problems reported so far. Multiple reboots of the switch still report the same error.
I have reviewed the history of what I have done on this switch and finally think I found the problem. I noticed a microcode_update directory that I am not used to see on a 3750. Deleted the directory using the rmdir command and rebooted the switch. On reboot, I noticed that a front_end/ directory was listed as being created as well as fe_type_1 and fe_type_2 were created. The switch now boots up without any errors.
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Jan 3, 2013
I have two Cisco Aironets 1401 connected to a Cisco Catalyst 3560 Switch. When users log onto the Wifi the APs authenticate with a Freeradius that then authenticates with LDAP.
Recently users have been getting kicked off of the network but I'm not sure why.If so how do I set these APs to roam with my setupd?For all I know there could be an issue with the switch I'm just not sure where to start when it comes to troubleshooting this issue.
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Dec 29, 2012
Guys I am using a cisco 2911 router with three interfaces: Gi0/0 connected through a switch to all my servers and Gi0/2 which will connect to another server, and Gi0/1 is my outside interface connecting through a switch to two ISP's.I have webservers and Terminal servers/File Servers with 10.0.0.0 network address connected throught My Gi0/0 interface.Now I want to implement a Cisco Advanced firewall for security on my router using CCP.I want the firewall to work such that it allows external users to access the servers on Gi0/0 through ports 0,23,25,20,21,53, 110,3389. and to access the SIP server on Gi0/2. My issue is can i just create two DMZ's for both interface Gi0/0 and Gi0/2 without creating an inside zone and Gi0/1 as outside zone as my internal traffic is mostly server based and the users connect remotely through terminal server to access resourcess using RDP, secondly how do I open the relevant ports.I have checked alot and all I have seen is just basic process on using the wizard I have no idea how to go about this issue.
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