Cisco :: FastEthernet0/0 Is Up / Line Protocol Is Down
Jan 26, 2013
I was working on a problem the other day and came across something that I had seen before but never given much thought. I had a router with a switch connected to it and the interface was showing as Ethernet0 is up, line protocol is down. The problem in the end turned out to be a cable that had fell out because it was not connected correctly, but I was able to replicate this interface status on a router (FastEthernet0/0 is up, line protocol is down), and NO cable was attached to the interface.I've had a look on the internet but cant seem to find a good answer, so does anybody else know why this status is shown on the router? Remember, NO cable is connected to the interface so it isn't a speed or duplex problem
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Sep 7, 2009
how to bring this interface back up? It's a 1252 with 80211.n.I started configuring it with CLI and then was using the web interface. I made a change on the web interface and it caused the AP to hang. I rebooted it and can access via Hyperterminal, but I cannot ping the IP address nor bring it up in the web interface any longer.I tried the "No shut" command in the BVI1 interface.
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Jan 21, 2013
I'm replacing a PA-POS-OC3-SM with PA-POS-1OC3 in a flex Wan module (WS-X6582-2PA) in Cisco 6506 using WS-SUP32P-GE PISA.I have a hard time bringing the "protocol up. the status I see is line up and protocol down. Debug shows (attached) no comunication with the edge router but when i put the older PA (PA-POS-OC3-SM ) back evertything works fine and older PA has been running for many years without the issue. I'm replacing older PA is becuase this is going EOL. I had opened a TAC case but the TAC engineer added no value. [code]
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Aug 2, 2012
I have a cisco 1841 whose LAN interface is showing status as "Fastethernet 0/1 is up , line protocol is down" the duplex and speed settings in the Router are in Auto mode and the Router was working fine till now , when i changed the duplex settings to duplex full , speed 100 the ping replies comes back with 5-6 replies then the link dies again..
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Jul 8, 2011
We have a 6 spoke DMVPN setup. Five of the six spokes work fine. On the 6th spoke, a 2911, we have created a Tunnel0. Other spokes and the hubs can ping it's ip, but it can't ping itself. When we do a show interface it shows the Tunnel 0 is up, but the protocol is down. What does that mean?
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Aug 27, 2012
I work for a Wireless ISP and the device impacted is the back haul radio into the site. I have swapped from a 2950T to a 3550. Replaced the radio, PoE, patch lead. We have re ran the cable up the tower using shielded outdoor cable with a drain wire which has been earthed to an earthing block in the cabinet. We have other devices on the tower not experiencing the issue. We suspect cable interference however am now at a loss to diagnose further.
[Code]....
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Aug 11, 2011
I configured dot1x on my swicth 4500 series, Here is the interface configration:
interface FastEthernet3/2
description Test dot1x
switchport mode access
load-interval 30
authentication event fail action authorize vlan 800
authentication host-mode multi-host
authentication port-control auto
[code]....
When I remove the port-control configuration on the interface, the status change to UP/UP.
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Jul 11, 2012
Have been battling a router connection to new ATT t1 connection. Router was configured and sent from sister company to this new location. We have had ATT tech test circuit and it tests good, had cat5 cable tested from ATT to router, it tests good. I continue to get serial up/ line protocol down status though and cant communicate to it from wan.
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Aug 13, 2012
We have 4 switches C3560 running EIGRP. We have PBR in one of them in this way: [code]We have conneceted a dedicated circuit in FastEthernet0/23.
The question is: ¿what would happen if circuit fails but FastEthernet0/23 remains in connected state? 192.168.1.6 will be unavailable.PBR will maintain forwarding traffic to IP 192.168.1.6? This involve that this traffic will fail.
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Oct 10, 2012
Cisco 2500 series access servers show line usage with the "show line" command:
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Mar 27, 2012
The reason is i want to know the difference between the leased line and the DSL line. The whole thing behind the confusion is, We plan to have a high speed internet connection in our office. We will don't have a branch office or some thing like that. I preffered to have high speed internet in our office. I found in some website that Lease line will have high speed connectivity(Upto 10Gbps). Can i use the lease line or DSL is enough for our office. Our office contains of 82 user who will use internet.
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Feb 9, 2013
Can we implement BGP without IGP Protocol ? If yes, then how can we do it ? If no, why ?
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Sep 3, 2012
I want to know the CAPWAP protocol.
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Nov 9, 2011
I have a 2801 router. The Fa0/0 int shows up/down. I have plugged it into diffrent cisco and non cisco switches and even a cross over cable to my laptop. I cant seem to get the protocol up. I have changed the speed to 100 and duplex to full to try to get it up that way and nothing. [code]
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May 29, 2011
I want to know how to use ICMP protocol in sending a packet in a network ?
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Apr 25, 2013
I'm trying to run an OSPF protocol over an ATM connection:
192.168.80.0 |----10.0.0.1-----------10.0.0.2----| 192.168.50.0
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Apr 18, 2013
I'm looking to make a possible configuration for a customer. They need a device to provide :- firewalling- bandwidth limiting based on protocols, IP, users- web content filtering- good reporting to see which device/users are consuming most of the bandwidth.I used to use cisco ASA as firewall but it's a while I last installed on and I'm nt uptodate which current state.So I thought of using an ASA 5512-X but I'd like to know if it comply with all the requirements .Most important being the reporting and bandwidth limiting capability. It would be great to have some configuration example regarding bandwidth management.
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Jul 6, 2011
I am currently configuring a number of cisco 2811 routers that require the BGP exterior routing protocol, however the IOS version (12.4) currently installed does not support the bgp protocol.After entering the commands into the cisco CLI 'protocol not in this image' is returned.
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Dec 30, 2011
I have a Pix 515E running PixOS version 8.0.4 with two interfaces, inside and outside.On the inside interface, I have a Redhat Enterprise Linux 5.4 64 bits machine as an NFS server version 4 (NFSv4).On the outside interface, I have three (3) Redhat Enterprise Linux 5.4 64 bits as NFS clients.I am looking for the exact UDP and TCP ports to be added to the ACL in order to accomplish
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Oct 22, 2012
What would be the access-list entry to allow protocol 97? I am setting up foreign-anchor controller and need to allow protocol 97.
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Dec 28, 2011
My ISP is going to provide internet with dual path , for auto changover he (isp it admin) is planing for bgp implimentation.
is 1941 is supportable for bgp protocol ? Is it possible to create bandwitdh rate limit based on ip address on access list (be cause we are getting some 10 Ip address from isp , out of 10 ip address , 3 ip addres has to go 3 diffrent departments) , i want restrict theese 3 ip address with 1 mb traffic as 1:1.
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Mar 28, 2013
I am using the Self RADIUS server in my Cisco ACS SE 4.2 appliance S. I have an AAA client C that interacts with S by means of the RADIUS protocol. This works fine, in that S correctly carries out authentication chores on username/password (PAP and CHAP) pairs received from C, sending back to C the corresponding Access-Accept packet when the authentication succeeds, or Access-Reject when it doesn't.
I have been able to import a set of three VSAs into S. Each of those attributes is of string type. I then configured in S a single user U with password P so that, whenever a U/P pair received in S from C is authenticated by S, S should send back to C, in the Access-Accept packet, the three attributes with the following values: [code]
With this setup, when an authentication is successfully completed by S, C receives 53 bytes worth of data from S every time. I am attaching a typical example, already disassembled. I have disguised the actual vendor ID, for legal reasons, but the rest is exactly as it was when received in C.
According to the disassembly, what we got is an Access-Accept packet, as expected. Its length is 53 bytes - again as expected, for this is the only packet that C has received from S here. However, the packet is incomplete, for attribute #3 is missing its value field.
Looking into the whole packet in more detail, it can be seen that while the wire format for the first attribute, namely, Frame-IP-Address, is correctly constructed, the remaining are not. For example, the sequence of bytes corresponding to the attribute #1 reads 1a 09 00 00 xx xx 2c 61 62 63. I believe that this is incorrect; it should be 1a 0a 00 00 xx xx 2c 61 62 63, for the wire format for this attribute consists of 10, not 9, bytes. I tried a few variations on the values for the attributes, and the results are always substantially the same, in that the wire formats for these attributes are always incorrect.
This all probably implies I have done something wrong when importing the VSAs into S, and/or when configuring things on S. I am therefore attaching the csv files I used to import my VSAs into S; as before, names and vendor ID are disguised, but their lengths are exactly the same as in the undisguised file. I used two csv files: One to import the vendor ID, and the other to import the VSAs under that vendor ID. As for user U, in S's administration GUI I clicked on User Setup and selected user U, moved to the bottom of the screen, where the attributes for this particular vendor were present,introduced the values for each attribute mentioned above, and made sure that button in front of each attribute was ticked.
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Jan 26, 2013
I am encountering a problem with location of website i.p address and its port
[code]...
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Apr 19, 2011
what's the standard protocol to transfer R2 to SIP?
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Jan 31, 2013
What is inter vlan routing protocol? What are its three modes?
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Mar 9, 2012
I'm having an issue with my Cisco 2811. The Internal FastEthernet0/1 interface is showing Link up but Protocol down. I have tried various combinations with the speed and duplex on the port and having no luck.The port connects to our Fortigate 110c router.
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Mar 22, 2011
The IP defined in RFC 791 was the first widely-used version of the Internet Protocol. Interestingly, however, it is not version 1 of IP but version 4! This would of course imply that there were earlier versions of the protocol at one point. Interestingly, however, there really weren't. As I mentioned above, IP was created when its functions were split out from an early version of TCP that combined both TCP and IP functions. TCP evolved through three earlier versions, and was split into TCP and IP for version 4. That version number was applied to both TCP and IP for consistency.url... what i wanna know s in tat underlined line its given 3 versions of TCP what r they?
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Feb 14, 2012
I just bought 2 Nexus 7000 to upgrade my primary/Production Data Center from 6509/MSFC. I'll keep the 6509E/SUP720 for the DR Data Center. I have ordered two 10Gig Wan Pipes between the Production and DR. In other words between the Nexus 7000 and the 6509E.
My problem is that i do not know the best way to do the routing between the 2 Data Centers. Currently I have MPLS with a provider connecting the 2 Data Centers using BGP on the CEs and I'm running eigrp in locally in the Cores. After the 10Gig comes to life, the MPLS will go away.
My QUESTION: Should i run ibgp between the 2 Nexus and ibgp between the 2 6509E/sup 720 AND THEN run ebgp between the Nexus and the 6509/sup 720 over the 10Gig WAN? OR should i collapse everything into one eigrp domain/AS and just run Eigrp between the Nexus and 6509E/Sup 720 over the 10Gig Wan?
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Jan 1, 2013
I'm trying to configure an Cisco 1841 with IOS 12.4 to an FTTH conection.I would configure PPOE protocol in the vpdn-group 1 but I can't see this option in the command line,I have read about the command "bba-group pppoe global" but i'm not sure if it has the same result. It's valid? How can I use the bba-group pppoe global¿? I need to use it with a virtual template?
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Apr 10, 2013
We are using CISCO LMS 4.2.3 in our network in India, we are facing a issue regarding alarm generation for a protocol flap/down, especially when BGP / OSPF neighbourship got flapped.These flapping will result in the data service degradation , by which we came to know that some protocol flap may occurred at router end & then we go for the manual check by login into the router.After escalating the same to cisco we came to know that it is a bug of Cisco LMS. using any other method/technique to view the protocol down alarms automatically for cisco routers.
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Apr 1, 2011
If I want to use the command match protocol xxxx when configuring traffic classification for QoS, is necessary to have the following licence?
-FLASR1-FPI-RTU
-Flexible Packet Inspection RTU Feature License for Cisco ASR 1000 Series.
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Oct 12, 2011
I want to know why all my wifi client connect only in G protocol, even if the wireless card supports N, even if all the AP in one of my buildings is AP3500. In the WCS config for my two WISM controller the 802.11a network status is disable, the 802.11n network status is enable and the 802.11b/g Network status is enable and 802.11g support is enable. even in that part of config the 802.11n is enable.
In the High throughput 802.11n section all the rates is check to be supported.
What config I'm missing to get my 802.11N client to get connected with this protocol and not on G protocol.
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Jan 10, 2013
I have bought Cisco ISR 881 C880DATA-UNIVERSALK9-M with c880data-universalk9-mz.150-1.M7.bin ios.
command "show ver" tell me:
License Information for 'c880-data'
License Level: advsecurity Type: Permanent
Next reboot license Level: advsecurity
So I have advsecurity. On cisco site there was a thing URL
"Table 5. Cisco IOS Software Features on Cisco 880 Series: Advanced Security Feature Set (Default)"
that tell me I have RIP protocol to use. But when I type "router rip" command and sub router sommands like: network, passive-interface, redistribution. There are no in runnning-config such things after all I've done. It have not been saved.
then the command "show licence":
#show license
Index 1 Feature: advipservices
Period left: Not Activated
Period Used: 0 minute 0 second
License Type: EvalRightToUse
License State: Not in Use, EULA not accepted
License Count: Non-Counted
License Priority: None
I need even RIPv2 to have simple routing information to exchange.
And I don't know. Cisco 880 series is G2 or G1. Cisco ISR beginning from 890 series is G2. About 880 I don't know. There no informanion about it or at least I have not found it yet. On one 891 is the same problem. When I type "router eigrp 1" everything is great. But when "router rip" - do no work.
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