Cisco WAN :: 2821 - Pinging Loopback Address
Sep 11, 2012I 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
View 1 RepliesI 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
View 1 RepliesI have an Issue.In my networks, 1 single user is facing Network Slowness issue. i needs to check to which port user is coneected in switch to CHeck whether that port has any errors.But problem is, i am providing support from remote location.And my concern LAN segment is Very big,I have only user Ip address details,when i ping the Ip address from Core switch it is pinging. but when i give show ip arp & give Ip address then its not learning and listing out the Mac address to trace down to the specific port.
View 3 Replies View Relatedwhen I ping another workstation on my local network I should get back it's local IP but instead I am getting an ip address that resolves to somewhere in Germany! In fact if I ping any bogus name, I mean anything, it returns this same address 62.116.181.25. If I shut down my cable modem then everything resolves correctly. And yes I have DNS relay enabled because it seems to be the only way to get the workstations to resolve external sites correctly.
View 2 Replies View RelatedOn a cisco 2821 running 15.1(3)T1 From this cisco DOC, common use of secondary IP addresses on an interface are
•There might not be enough host addresses for a particular network segment. For example, suppose your subnetting allows up to 254 hosts per logical subnet, but on one physical subnet you must have 300 host addresses. Using secondary IP addresses on the routers or access servers allows you to have two logical subnets using one physical subnet.
•Many older networks were built using Level 2 bridges, and were not subnetted. The judicious use of secondary addresses can aid in the transition to a subnetted, router-based network. Routers on an older, bridged segment can easily be made aware that many subnets are on that segment.
•Two subnets of a single network might otherwise be separated by another network. You can create a single network from subnets that are physically separated by another network by using a secondary address. In these instances, the first network is extended, or layered on top of the second network. Note that a subnet cannot appear on more than one active interface of the router at a time.
On the WAN interface I've added two Secondary Public IP's (from the same subnet) to use for NAT to internal hosts. Is this a common scenario or is there a more typical way to acheive this. This assumes, I do not want to put a Public IP on an interface on the internal server.
interface GigabitEthernet0/1
description WAN$ETH-WAN$
ip address x.x.x.1 255.255.255.240
ip address x.x.x.2 255.255.255.240 secondary
ip address x.x.x.3 255.255.255.240 secondary
[code]....
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.
View 6 Replies View RelatedHow can we manage ASA in GNS3 through ASDM? And How to install image for IDS in GNS3?
View 2 Replies View RelatedI 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?
View 7 Replies View RelatedI 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 ?
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?
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
View 1 Replies View RelatedI 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?
View 2 Replies View RelatedI 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)?
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?
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
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.
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..
View 3 Replies View RelatedI 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.
how do I telnet to remote devices from nexus 7000 with source interface as loopback 1?
View 1 Replies View RelatedI've attached my ASA's config. I can't bring the VPN up by pinging from the ASA but the VPN will come up when someone pings from behind the ISA server. So the problem seems to be routing/NAT on my ASA because my pings aren't being directed out the tunnel. The VPN in question has 64.106.x.x as the peer and AES 256/SHA for phase 1 and 2.
View 2 Replies View RelatedI 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.
View 4 Replies View RelatedI found that Alternate LAN card will support.After replacing another LAN card i can ping all switches.But i want to know why my pc not pinging certain switches connected in network.Even i cleared the port security
View 5 Replies View Relatedmy system ip not able to ping by other system in my company network but my system is in the network and able to ping other system in the network my system IP have static IP and IP is pinging on by server
View 1 Replies View RelatedWe have recentrly replaced a 1700 router with Cisco 3945 router (Core Router) and the Channalised E1 interface is configured as given below: [code]
The issue happens intermittenly and makes network not reahable.Status of the links are UP/UP - No traffic forwarded through the link (Ser 0/0/0:1 and Ser 0/0/0:2) and at the same time not able to ping the local IP Address as well - 10.5.10.1/10.7.10.1.No issue on the Ser 0/0/0:0 link - Working fine.If you replace the new router with the old one all are working fine.
Here's my basic setup:
Computer A:
IP- 192.168.0.3
Mask- 255.255.252.0
Gateway- 192.168.0.2
[Code]....
Computer A can ping Firewall 1 and Firewall 2, but not Computer B. Computer B can ping Firewall 1 and Firewall 2, but not Computer A. Firewall 1 can ping Firewall 2, Computer A, and Computer B. Firewall 2 can ping Firewall 1, Computer A, and Computer B.
Why can't the computers ping each other, but their default gateways can? I've specifically allowed ICMP any any on all the affected interfaces.
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?
One computer does not see the other through pinging...but somehow we are connected...strange i know. My confusion ( being network illerate ) is with the names and etc. and some terminologies ie ..client? host? I have found in the past when someone triesthey use words or areas that do not coincide with my system...which is laptop with win 7 prem and desktop XP sp3
View 2 Replies View RelatedI have 2 NIC cards on the same machine running Redhat 9.I need to setup the machine in such a way that both cards are in the same subnet but card on port eth1 can be reached through card on port eth0.I tried modifying the iptables (with the limited knowledge that I have on it,used google) and even tried turning it off.I also tried setting files /proc/sys/net/ipv4/ip_forward and /proc/sys/net/ipv4/conf/all/proxy_arp to 1 but was unable to ping from IP address on port 0 to IP address on port 1 and vice-versa
View 1 Replies View RelatedI 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.
If we have the following setup:Host A (IP :192.168.1.1, Prefix/length : 24, GW : 192.168.1.254) connected to the Router A on int Fa0/1 (IP : 192.168.1.254), Router A is connected to Router B, Host B (IP :192.168.2.1, Prefix/length : 24, GW : 192.168.2.254),connected to Router B on int Fa0/1 (IP : 192.168.2.254).Using the mentioned setup, after Host A pings Host B successfully, which entry will be in the ARP cache of Host A to support the transmission ?.
View 3 Replies View RelatedI am getting RTO while pinging my L3 switch 3750 that happened after restarting switch,i have restarted it because I am not able to browse internet through URL,i am able to do it trough ip address, so I restarted it not I am getting RTO.
View 1 Replies View RelatedWhen 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.
View 1 Replies View RelatedRegion : 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?
I will be moving away from my home computer but will still want access to it so I am trying to set up a VPN between it (home computer is windows 7) and my fedora 15 machine. They are currently on the same 192.168.1.0/24 network so I'm wondering if that may be the cause for my troubles.
Here's my setup:
Fedora 15 (192.168.1.3) is running the PPTP server with pptpd and gives 192.168.1.66 to any vpn client that connects to it./etc/pptpd.conf only has "localip 192.168.1.3" and "remoteip 192.168.1.66" options in it /etc/ppp/options.pptpd has "refuse-pap, refuse-chap, refuse-mschap, require-mschap-v2, require-mppe-128, proxyarp, lock, nobsdcomp, novj, novjccomp, nologfd, debug, dump" options Windows 7 (192.168.1.6, 192.168.1.66) is the client and I have it set to use connect to the public IP address of my router, PPTP, require encryption, only allow mschap-v2, don't use gateway in ipv4 properties.Both machines are connected to the same Belkin router (192.168.1.254) and I can ping locally to and from each computer no problem. The problem is my VPN connection is very inconsistent. I will open a ftp connection to 192.168.1.66 from 192.168.1.3, login, start uploading a file, get about 10MB uploaded, and then the VPN connection will die and the upload will fail. But, when I have "ping 192.168.1.66" running while uploading, the connection stays alive.