Cisco Switching/Routing :: ASR1000rp1 / PIM-SM Neighbor Go Down And Not Coming Up

Jul 21, 2012

I have 2 ASR routers running PIM-SM between them on several sub interfaces.PIM hello interval configured for 200ms.Sometimes PIM neighbors between ASR routers going down.
 
Reboot for each router not resolving the problem.Deleting  ip pim sparse-mode and configuring it again on one of the ASR routers resolves the problem.
 
I didn't find any related bug.The version is asr1000rp1-adventerprisek9.03.06.01.S.152-2.S1.bin

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Cisco Switching/Routing :: 3550 / Routing Protocol Neighbor Between SVI And Routed Port?

Apr 18, 2012

I have a collapsed core design with routed ports between all components. Access layer switches, data center switches, core/aggregation. All routed (no spanning-tree at all).Now...I have to add an IBM BladeCenter with a BNT layer 3 switch to my topology. However, those nasties don't seem to support routed ports.How can I have a routed port on my cisco switch and a standard access port on the BNT and still establish an adjacency with an SVI? I am running OSPF, but I am labbing this in my home lab with 2 x 3550s and EIGRP.
 
On SW2:
*Mar  1 00:57:00.711: EIGRP: Received HELLO on Vlan100 nbr 10.1.1.1
*Mar  1 00:57:00.711:   AS 999, Flags 0x0, Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
*Mar  1 00:57:02.303: EIGRP: Sending UPDATE on Vlan100 nbr 10.1.1.1, retry 9, RTO 5000 tid 0
*Mar  1 00:57:02.303:   AS 999, Flags 0x1, Seq 17/0 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1

[code].....

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Cisco Switching/Routing :: 6509 OSPF Neighbor Fails Due To Bad ISA

Mar 26, 2009

our backbone (6509) is connected to atm backbone (nortel passport) those are connected through  giga Ethernet interface and running ospf in area 0. One week ago we lost the ip connectivity between those backbones, the interfaces were in up but the neighbor relation fail and it was kept in LOADING STATE, according  we the logs the neighbor relation fail because a BAD LSA was received (error messages %OSPF-4-ERRRCV:Bad LSU adv and %OSPF-4-BADLSATYPE:Invalid lsa:Bad LSA chksum Type 5 were received during the outage)We check in cisco and this is quite normal behavior if we receive a bad LSA but the customer is asking why we have the same error message for long time and we didn't lost the neighbor relationship.

how many bad lsa we can receive before to lost the neighbor relationship.We receive two errors messages for bag lsa.. [code]

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Cisco Switching/Routing :: 3750 / EIGRP Router Won't Update Neighbor With New Network

Apr 18, 2012

I am working at a client site today on a routing issue.  I am currently working on an issue where a 3750 switch running EIGRP will not update its neighbor router when a network statement is added to the eigrp instance.The neighbor is a 3825 router.
 
Both the switch and the router have a common network which is 192.168.36.0/24.
Both the switch and the router are in a neighbor adjacency.
Both boxes have "no auto-summ" in the routing configuration instance.
 
I can run debugs on both routers (debug eigrp packets) and then I can watch queries and updates when I issue "auto-summ" or "no auto-summ".  Also I see a "graceful restart" for the peers when this is done.I had an expectation that when I added the network (this is just an arbitrary network for testing, which is 172.16.69.0/24).  I wanted to watch this network being sent in an update to the neighbor router.When I add the above mentioned network, there are no updates packets sent from the 3750 to the 3845.  I have not had success to this point trying to resolve.  I have followed the Cisco document "Troubleshooting EIGRP Flow Chart", but have exhausted all it has to offer and now it is at the point where it is telling me to contact TAC.

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Cisco Switching/Routing :: 2921 Interface Not Coming Up

Oct 2, 2012

I have a CISCO2921. I am not able to bring up its gi0/1 interface. It stays down down.
 
[URL]
 
I know that interface is not coming up because of "no media" below. Router#sh int gi0/1 | i media  Auto Duplex, Auto Speed, media type is no media
 
I have tried media rj-45 and media sfp which have also not worked. The other end of this link is ethernet handoff. What is it that I have to do for the link to come up? If I change the connection to gi0/2, I think that will work because I see this for gi0/2:
 
Router#sh int gi0/2 | i media  Auto Duplex, Auto Speed, media type is RJ45

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Cisco Switching/Routing :: 3750X 1GB Ports Not Coming Up

Jan 22, 2013

I have hardcoded 1GB ports on 3750X to 1000 and full duplex for all servers connected. THe ports are not coming up with this speed and duplex settings. If I configure them to 100, I am able to see the port is up. Whereas if i connect the same servers to 2950 switches, i can see the ports working fine with 1000 speed ..we have tried with the latest universal IOS as well

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Cisco Switching/Routing :: Wireless APs Are Not Coming Up Of New Catalyst 4510R-E PoE

Sep 10, 2012

We have recently purchased Catalyst 4510R-E with two PoE line cards. When we connected Cisco Wireless APs to Cat4510 PoE ports it did not come up. These WAPs are working fine on other Cisco switch with PoE ports so there is no issue with WAP. We have received two CAT4510 and on both two slots are populated with PoE line cards and on both switches WAPs are not coming up. PC/desktops are working fine on these ports.Is there any configuration required on Cat4510 to enable PoE feature.

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Cisco Switching/Routing :: 2801 / 3550 - HTTP Web Not Coming On?

Sep 22, 2012

2801 Router
3550 switch
3500 switch
2 2950 switches
2 pc hosts
 
Basically I have both PC's pinging 4.2.2.2 DNS, Layer 2, Layer 3 intervlan routing functioning, 2801 Nat is translating, able to ping default gateway of ISP and have configured DNS from what ISP has given under my DHCP scope, however Im still not getting, web pages opening up when i open mazzila or firefox !

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Cisco Switching/Routing :: Jumbo Frames Coming From Catalyst 3100?

Dec 2, 2012

I have a Cisco Catalyst 3100 blade in a Dell server chassis that is trunked to a 6509.
 
When doing a protocol capture, I see large frames being sent from one of the servers in the chassis.
 
Example:
 
TCP:[Continuation to #1701] [Bad CheckSum]Flags=...AP...,   SrcPort=HTTP(80), DstPort=2667, PayloadLen=2831, Seq=1489611217 - 1489614048,   Ack=1719592331, Win=65535 
I see lengths up to 6900+ bites coming from the server.
 
The switch has the global MTU set to 1500
 
system mtu routing 1500
 
and I can't seem to set this at the interface level. The server is configured to send 1500 length frames. Why am I seeing these jumbos? (the server is Windows 2003)

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Cisco Switching/Routing :: Nexus 5548 10GB-LR Interfaces Not Coming Up

Jun 21, 2012

We are trying to connect 2 nexus 5558UP (5.1.(3)N1(1)) with 10G-SFP+-LR interfaces. The interfaces are not genuine cisco's (smartoptics) but as far as we can tell, they are accepted by the hardware. If we take a look at the optical levels, we can see that the switches can see eachother (double-checked by bringing down one interface to see if optical levels really disappears) on optical level, well within limits. I found a notice about changing debounce timers but this doesn't work, setting it to 0 or 1000 doesn't make a difference. Copies of the different show int commands can be found at the end of this text.
 
Wim Holemans
Network Services
University of Antwerp
 
swnxds01-enable# sh int eth1/3 transc details
Ethernet1/3(code)

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Cisco Switching/Routing :: 7606s Power Coming From Single Supply

Apr 6, 2012

Having a strange issue here with an 7606-s chassis equipped with two sup720's, and two regular line cards. There is only one power supply, PWR-2700-AC. I recently builded this setup and powered it on last week for the first time. It ran fine for about 20 minutes while suddenly the chassis powered down.
 
I've checked the back of the chassis and noticed that the power supply had it's 'input ok' and 'power fail' led lit. I toggled the power switch and waited half an hour to power it on again. This time only 1 minute of joy. My first idea was the PSU due to the power fail led so I had it swapped by the supplier for another. Unfortunately, when I powered it on today, it didn't change a thing, still unexpected power downs.
 
So I've checked the following documentation: [URL] and followed the suggestion to power the chassis on without any modules in the slots. So I did that and it ran for 8 minutes only. However, the fan tray did respond properly when I removed the small thermal module in the upper right by increasing the fans to full speed.
 
Following above documentation, it points to the chassis (there is not much left). Now the real question comes, isn't there anything else that could be the cause of this?

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Cisco Switching/Routing :: PPP Multilink Not Coming Up On Serial Interface / 3620 Router?

Nov 1, 2011

I just finished setting up a bundle of (2) T1's in a multilink bundle and I'm having issues with one of the T1's not wanting to join the bundle.
 
The router I'm using on the remote office location is a 3620 router running code c3620-i-mz.121-1c.bin
 
The campus router which is a 7206 is setup the same exact way with multilink 240 and like I've said, serial 0/0 is joined to the bundle just fine, so we are running off one T1 connection.
 
The serial interface that is not working is: serial 0/1
 
Here is a show-run:
 
interface Multilink240
ip address 172.18.xxx.xxx 255.255.255.252
ip route-cache flow
ip ospf network point-to-point
service-policy output PhonesFirst
ppp multilink

[code].....

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Cisco Switching/Routing :: Nexus 7000 / Interface Isn't Coming After Once Telco Gave Loop

Oct 26, 2012

we are bringing up new ckt and nexus 7000's interface isn't coming up once telco gave a loop. and wee following msg when I do "sh int eth1/1".
 
(UDLD Tx Rx loop, port: error)
 
what does "(UDLD Tx Rx loop, port: error)" it mean?before loop. interface was showing as "Link not Connected".

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What Happens If A Neighbor Has Same SSID

Jul 21, 2012

I renamed my SSID to "CoolWifiName" so that it's not the router's generic name, but what if a neighbor in my building uses that same name and uses it as their SSID? Since I wouldn't know which is which, and I mistakenly try to type in my wifi password on their's, would they have access to my password and be able to capture it?

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Wireless :: Why Does Neighbor's Name Show Up On Net

Feb 13, 2011

Sometimes my wireless connection goes away.It just started doing this the last 2 months. I have to get next to my router in order for it to come back. My name will be in the list and so is my neighbors.

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Restricting The Neighbor For The Wireless Internet

May 29, 2012

I have a neighbor, whom I barely know, (don't know his name even) ask if I would be willing to give him the number off of my modem so he can cannot wireless to my internet. I believe that is a bad idea. For one I don't know him but if it was possible and I did that, would he be able to access my account? or start more trouble? He at first said If I give him the numbers off of my router but then I stopped him because I have a modem not a router. So I would never let him but was curious if someone can tap into a signal of mine from a laptop next door to me using wireless signal? And if so can that person see all of my stuff? Would my computer and I be at risk?

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CentOS VPN Box Neighbor Table Overflow?

Aug 24, 2011

I'm having problems with a linux box we're using as a VPN/IPtables firewall. The setup is such that we're sitting this thing behind a basic Comcast cable modem will all the pass through options set. The outside facing interface is set to DHCP and grabs an IP address from Comcast. Inside interface is statically set with the same being said for the CIPE interface. The inside interface works until we plug up the outside. When we plug up the outside interface, all network traffic to the box effectively shuts down and the /var/log/messages is flooded with "neighbor table overflow" messages. Sometimes, this takes a few seconds to appear, and when that happens I can track some traffic hitting the far side of the tunnel, I.E. it works for a few fleeting seconds.

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Neighbor's Wireless Not Showing Up So Can't Delete It

Feb 26, 2012

I have a wireless PC laptop and a router that works fine. When I change rooms, there's competition from my neighbor's router and I want to remove it. When I "view wireless networks" I see their connection. When I go to "change the order of preferred networks" (hoping to delete it from there) it doesn't show up. If I go to "change advanced settings" I end up in the same place not showing the neighbor's wireless.

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How To Extend Wifi Signal From Neighbor

Aug 9, 2011

My friend has an internet connection and Wifi, it reaches my room but with poor signal, is there any way I can strengthen up the signal?

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Cisco WAN :: 3750 OSPF Neighbor Stuck In Exstart

May 5, 2012

We have an existing network with OSPF configured between 3750's (DR and BDR) this is working fine.But the Nexus 7k which has been configured to run OSPF, won't established the adj. It is in the same network/subnet.The MTU is 1500.

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Cisco :: Prime NCs To Get Access Point CDP Neighbor Report LMS 4.2

Dec 4, 2012

We are about to a large amount of access points from access ports to trunks. Is there a report function in NCS that will give me a list of the APs and their CDP neighbor? I am able to view the information under "monitor/devices/access points" but I can't export that information to a useable format.
 
When I get the list the next step will be to create a configuration task in LMS 4.2 to configure the switch ports.

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Cannot Connect To Home Wireless Router Except Neighbor

Dec 18, 2011

All is functioning but I can't connect to my roommates' wireless router.BUT I am able to connect to my neighbors' unsecured network without a problem. I also have a laptop that connects without a problem to it. The network is secured and I am definitely providing the correct network key/password. I compared the network settings on my desktop with the ones on my laptop and its the same.

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How To Connect To Neighbor Internet With Wireless Router

Dec 13, 2012

How can I receive the Internet of my neighbors internet with a wireless router and how far will it Carry?

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Cisco WAN :: 3825 Will Not Add Routes To Topology Table From Eigrp Neighbor

Mar 13, 2013

I have a 3825 running c3825-advipservicesk9-mz.124-24.T8. It is configured as an eigrp stub advertising only its connected and static routes. There are three WAN connections using a metro ethernet service. Two are data, one for voice traffic. The primary data connections run to two WAN edge ASR1002 routers.
 
The primary data connection (Gi0/1.943) is 20 Megs, the secondary data connection (Gi0/1.944) is only 15 Megs. Before the secondary connection was in place I only had routes to our backbone via Gi0/1.943 and everything was working great. Some time after the secondary data connection was turned up the routes to the backbone through Gi0/1.943 disappeared from the eigrp topology table causing all data traffic to flow through the less desirable secondary Gi0/1.944 interface to our backbone.
 
There is a good eigrp neighbor relationship between the 3825 and the ASR connected to Gi0/1.943, but if I show ip protocols it does not list the ASR as a data source. I know that the ASR is advertising its routes because I can see the updates coming from it if I debug ip eigrp. For some reason they are just not being added to the topology table by the 3825, not even as a feasible successor.
 
I have shut/no shut the interface multiple times at both ends during troubleshooting and I also reloaded and upgraded the code on the 3825 from 12.4(24)T to 12.4(24)T8. We also contacted the metro ethernet carrier to see if they had a policy that could potentially be blocking the traffic (no). My colleagues and I are just not seeing any feasible reason why these routes are not being added.

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Wireless :: Access Point Disappear From Neighbor After Two Minutes

Jun 26, 2011

i have switch 2960 POE connected to access point WiFi Cisco when we connect the AP you can see it in the neighbor after 2 minute all AP disappear?

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Cisco WAN :: 3620 - Cannot Issue Ospf Neighbor Command With NBMA Interface

Jul 27, 2006

I config my E0/0 Interface with "ip ospf network non-broadcast" command, I want this interface to use uni cast to hello neighbor.
 
As I issue "neighbor x.x.x.x" under ospf process, it told me that: OSPF: Neighbor command is allowed only on NBMA and point-to-multipoint networks. I am sure that there are no any typo, and show ip ospf interface e0/0 says it's been an NBMA interface, so what's wrong with this router?
 
IOS information:
(C3620-J1S3-M), Version 12.3(18), RELEASE SOFTWARE (fc3)

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Cisco WAN :: 4506 / EIGRP Neighbor Not On Common Subnet / Packet Loss

May 23, 2013

I was called into look at a customers's site that was upgraded by another vendor. They were complaining about packet loss and performance issues. I discovered they had changed from static routing and turned on EIGRP (100) and the EIGRP neighbors are not on a common subnet, they used secondary IP addressing to connect two 4506 switches to the core router. Correct me if I'm wrong, but won't this cause the neighbors to bounce and cause the degraded network performance? Don't we need to have a single common subnet for this to work? Either that or they have bridged the VLANs somehow? There is also a cable connecting the 4506 switches besides the uplink to the core router.
 
4506#1
 
May 17 21:28:55.443: EIGRP-IPv4(100): Neighbor 192.168.120.1 not on common subnet for Vlan1
May 17 21:29:05.848: EIGRP-IPv4(100): Neighbor 10.102.10.10 not on common subnet for Vlan20
May 17 21:29:17.327: EIGRP-IPv4(100): Neighbor 206.78.xxx.xx not on common subnet for Vlan20
May 17 21:29:48.291: EIGRP-IPv4(100): Neighbor 206.78.xxx.x not on common subnet for Vlan30

[code]....

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E2500 - Wireless Router Stops Working When Neighbor Uses Internet?

Jul 4, 2012

We use our internet to watch Netflix. We have had no problems until recently, I called the satellite Internet company(which is a local co.) they told me my router was going out. I bought a new one, problem solved! Right?!? WRONG   my husband told me my neighbor just got Internet and has been playing Xbox everyday which coincidently is between the 5:30pm to 10ish pm we have been having issues with our router. What can we do to fix this? Do I have to buy a bigger router? He is not stealing off mine because it is password protected that was changed when new router was setup and programmed. I have been running of a Cisco Linksys E2500 advanced dual band n router. The router is in the same room as the TV accessing it, which we previously had no issue connecting anywhere in the house or garage.

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Cisco WAN :: 861-W Traffic Coming In And NAT / PAT?

Oct 20, 2011

I am slowly getting this router configured........I am up and running.  Traffic from All nodes inside can go outside.  My next step is to configure traffic coming in to go to my server.  I have Web, FTP, SMTP and POP running on the same server in my LAN.  I need to us NAT/PAT to direct incoming traffic to it.  I belive I have this done correctly,  but obviously not...I only have port 80 configured in the config file,  if I can get that to work the rest would be the same........

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Cisco WAN :: 2921 Gi0 / 1 Is Not Coming Up

Mar 7, 2013

why Cisco 2921 Gigaethernet 0/1 is not coming up ? I also tried to connect the interface to another SWITCH with no joy.
 
ME3400 (ISP's switch)<-------------MPLS link--------------> Cisco 2921 Gi0/1 >>>>>>>>>>Port not coming up
 
I tried connection between ME3400 (ISP's switch) and spare switch and the INTERFACE of spare switch was in UP/UP state .Troubleshooting I did so far on Interface Gi0/1
 
1> Changed ths speed/duplex manually and revert it back to auto
 
2>diable keepalive
 
3> Tried differnet LAN cable with no luck
 
4> Please see HIGHLIGHTED part (in red colour) of "Show controller Gi0/1" command
 
I am pasting some of the SHOW command output R2921_MMP#sh run int gi0/1Building configuration.[code]

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Cisco Routers :: RV042 To ASA VPN Not Coming Up?

Apr 24, 2013

i am trying to make a simple Site to SiteVPN between two offices, one has Cisco ASA and one has RV042 router.when traffic initiated from ASA side, i keep getting this message in Debug and tunnel wont come up
.
[IKEv1]: Group = A.A.A.139, IP = A.A.A.139, Queuing KEY-ACQUIRE messages to be processed when P1 SA is complete.Apr 26 00:15:53 [IKEv1 DEBUG]: Pitcher: received a key acquire message, spi 0x0
 
whereas if traffic initiated from RV042 side, i keep getting this message in debug and tunnel wont come up.
 
Apr 26 00:43:44 [IKEv1 DEBUG]: IP = RV.RV.RV.139, Oakley proposal is acceptableApr 26 00:43:44 [IKEv1 DEBUG]: IP = RV.RV.RV.139, IKE SA Proposal # 1, Transform # 0 acceptable Matches global IKE entry # 6Apr 26 00:43:44 [IKEv1]: IP = RV.RV.RV.139, Connection landed on tunnel_group RV.RV.RV.139Apr 26 00:43:45 [IKEv1]: IP = RV.RV.RV.139, Connection landed on tunnel_group RV.RV.RV.139Apr 26 00:43:45 [IKEv1]: Group = RV.RV.RV.139, IP = RV.RV.RV.139, Freeing previously allocated memory for authorization-dn-attributesApr 26 00:43:45 [IKEv1]: Group = RV.RV.RV.139, IP = RV.RV.RV.139, PHASE 1 COMPLETEDApr 26 00:43:45 [IKEv1]: IP =RV.RV.RV.139, Keep-alive type for this connection: DPDApr 26 00:43:45 [IKEv1 DEBUG]: Group =

[code].....

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Cisco WAN :: 3750X SFP-T Not Coming Up On 100 Full

Apr 16, 2013

I try to connect 3750X (15.0.1(SE3)) with PC or router  that is interface card is fixed to 100Full on 3750X-12S-E I plug a SFP-T, this SFP is ok: [code]
 
But with Speed and duplex fixed the interface is up arround 1-4s and move to down and errer-disable.

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Cisco :: 4402 WLC / LMS 4.2 Threshold Coming

Mar 1, 2012

I'm using RADIUS and FlexConnect APs. The issue is intermittently users will lose connectivity as if they're de-authenticated. Their clients still believe they're associated to wireless but they have no network connectivity. On Windows 7 we receive the exclamation point over the signal strength indicator.
 
There doesn’t seem to be any rhyme or reason as to what is causing this. It doesn’t seem to happen at any particular time intervals or anything else I can identify. Sometimes users will go entire days without experiencing connectivity issues sometimes they can’t go five minutes. When the clients are experiencing the issues they cannot even ping their default gateway.

The setup was initially the following:
 
Site A: 1142N APs and RADIUS server (server 2003) users are authenticating to.
 
Site B: Flex 7510 running code 7.0.116
 
Between site A and site B there is a site to site VPN with no restrictions.

After some time of working with TAC and not getting anywhere I setup the following:Site A: 4402 WLC running code 7.0.116 connected the same 1142N APs HREAP mode.  I had the same issue with connectivity with that setup.Today I changed over to local mode and as of yet I haven’t had reports of connectivity issues.

When running ‘debug client MAC’ I see no indication of connectivity issues. I also have an NCS and I don’t see anything indicating what the issue is there as well. I’ve tried with both enabling and disabling ‘H-REAP Local Auth’. We seem to experience the issue in H-REAP standalone mode as well.

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