We’re rewarding the question askers & reputations are being recalculated! Read more.

Questions tagged [troubleshooting]

For questions requiring troubleshooting assistance with persistent/unresolved problems.

Filter by
Sorted by
Tagged with
13
votes
3answers
64k views

What is the meaning of RSSI?

When using mobile 3G routers, you see in the output of the "show cellullar 0 all" command. What is the significance of this value? Is this interpretation the same when talking about 2G or 3G? Ex: ...
5
votes
2answers
31k views

Troubleshooting “TCP Zero Window” Issues

I'm currently having a problem troubleshooting a trading application. Let me give a simple diagram of the current network setup (Gov't Stock Exchange Network Router)X-->(256kbs Leased Line)<--X(...
0
votes
1answer
425 views

Finding bad node in a network

If I have two sites from where I connect to a separate server in a remote location. From 1 site I can connect fine, i.e. good response times etc. However from the other site I cannot connect and the ...
3
votes
2answers
4k views

Cisco router telnet troubleshooting - connection timeout; unresponsive host

I cannot figure out how to establish a telnet connection between two routers in Cisco Packet Tracer. This is a relatively simple process, I know, but I have been back and forth looking for how to fix ...
6
votes
1answer
363 views

Odd stp issue on foundrys

I have 2 foundry devices running 802.1w which are both connected to an access switch which also runs 802.1w. The 2 foundry's are connected to each as well. I have the vlan configured on each of the ...
2
votes
1answer
509 views

HW State: DEAD - Cisco 3925

I received an alert stating that a crypto engine was 'dead'. I did a bit of digging and was able to find some output to validate this: #sh crypto eng config crypto engine name: Virtual Private ...
2
votes
3answers
4k views

TAC Response on the error( %SYS-2-MALLOCFAIL: Memory allocation)

I hope you can offer me some assistance with my case, we have a Cisco router 2800 series ,having the error ( %SYS-2-MALLOCFAIL: Memory allocation), (and if restarted the router it works OK for while. ...
-2
votes
1answer
382 views

Netgear UTM9S port forwarding causing drop off

Our company just installed a Netgear UTM9S and I've been trying to get our server visible to the outside world. I've gone into firewall settings and set up a new rule that states all incoming HTTP ...
2
votes
1answer
193 views

Troubleshooting Slowness in Stocks Trading Applications [duplicate]

Hi Fellow Network Enthusiasts! I'm having a hard time troubleshooting a Real Time Stocks Trading Application. Here are the Steps I've done so far: Apparently, this is the only Real-Time Application ...
1
vote
1answer
1k views

Uverse Can't Access One Site [closed]

I'm eight hours into this and no better off than before. My customer is a small office in a remote location, about 20 workstations and a Windows '03 server. They have been served by AT&T DSL for ...
1
vote
0answers
2k views

Cisco AIR-SAP2600 series AP random reboot

Our office seems to have started experiencing an issue where every 2-3 days our AIR-SAP2602 reboots then returns to normal function within ~2mins. I've checked the power source, made sure it's all ...
5
votes
1answer
2k views

Cisco Aironet Last Activity Counter seems not to work causing clients to drop frequently

My current Setup: Two SSIDs broadcasted SSID 1 (airlan) is configured with dot1X and dynamic vlan association SSID 2 (prv) with PSK and a static vlan I've recognized, that every 60s the devices on ...
8
votes
1answer
4k views

Unpredictable Juniper SNMPv3 Access Error

We're having issues where SNMPv3 ceases to accept SNMP requests on our Juniper EX series switches. In what seems like random occurrences, Juniper nodes refuse SNMP authentication credentials. This ...
6
votes
1answer
1k views

Split Horizon will not disable on interface

I'm trying to set up a DMVPN Phase 2 configuration, but I cannot manage to get past Phase 1 because the hub router's tunnel interface refuses to disable split-horizon. The spokes never form an EIGRP ...
4
votes
2answers
687 views

Multiple error types Cisco 861 router

I have a connection that users complain is really slow at times. My SNMP graphs from Observium don't show the bandwidth being fully used or high latency. They show a lot of errors on the WAN port of ...
6
votes
1answer
553 views

WIPS Alert: Reason “NoProfile” detected on AP

I'm trying to understand how I should act on a trap I'm receiving from our WLC WIPS Alert: Reason "NoProfile" detected on AP MAC: 00:1a:30:00:00:00, AP Name: West128_c3602i My searches for the ...
3
votes
2answers
5k views

Run out of ideas to troubleshout Ping issue Cisco IOS 3560 Switch

Summary Yesterday, four of the eight systems (connected to same VLAN, identical ethernet adapter settings) were able to ping tweakers.net. Today, another system is not able to ping the internet ...
4
votes
2answers
6k views

Cisco ISE - Issues after new CA Certificate

Our Root CA Certificate expired recently, in advance we loaded the new one on our ISE servers however after the expiry we have had issues with Android devices and BYOD onboarding. Apple devices are ...
2
votes
1answer
63 views

What could cause a previously working point to point to be accessible from only one side? [closed]

I have two sites that are connected using a pair of Motorola Canopy 5.7 Ghz backhaul units. They have been working for years without a problem but this morning we had a power outage for a few hours ...
7
votes
1answer
3k views

Cisco ISE backup shows as success but no data was written to backup server

I'm trying to back up a Cisco ISE server (version 1.2.0.899 patch 4) via sftp. I configuered a repo via the web gui. I added the hostkey (for the backup server) via the command line. I make sure the ...
4
votes
1answer
6k views

ASA 5510 NAT stops working

I’ve been searching on this issue and can’t seem to find info about it. I’ve inherited an older ASA5510 (8.2(1)) and unfortunately I’m pretty new to them. I have a set of overloaded NAT statements ...
3
votes
1answer
9k views

TCP Reset-I on Cisco ASA 5512x version 9.1

I am trying to setup simple RDP rule from outside TEST_IPs to inside server 192.168.1.5 LLDHH-ADC. I configured nat and access list but I am not able to RDP to the server. I am new to ASA world and ...
6
votes
1answer
2k views

SRX100 in bootloop. Flash storage problem?

About a month ago one of my SRX100 started to go into a bootloop for no obvious reason to me. After some hours, it eventually stopped and booted up the system again (primary) and I was happy that I ...
4
votes
4answers
2k views

CPU Impact of “debug ip packet” on Cisco Switches

in terms of CPU consumption and possible traffic disruption, what should I generally expect when I run the command: Switch#debug ip packet on a Cisco device in a large ISP network? Cisco devices in ...
6
votes
1answer
3k views

Cisco + FreeRADIUS: Exec 15 level privilege mode

I have two routers: Cisco ISR 2921 with IOS version 15.0(1r)M9 and a Cisco C2600 which is an old guy with IOS 12.0(7)XK1. I have this set up on a FreeRADIUS server: router-admin MD5-Password := "&...
3
votes
1answer
199 views

Apply an extended ACL on Cisco 7609 SIP-400

Good morning, I have configured a pbr to apply it to a virtual-template here is my route-map definition : route-map to_virtual_template permit 10 match ip address 101 set ip next-hop X.X.X.1 ...
9
votes
1answer
2k views

Strange drop-outs in Cisco 7200 LNS lab

I'm testing several functions on emulated Cisco 7200 routers, in GNS3, prior to actual purchase. One of the functions I've been testing out is LNS functionality. I've been primarily following this ...
7
votes
1answer
25k views

Configuring a Cisco ASA 5505 for routing

I'll start by pointig out that networking issues have always left me scratching my head. There is something about routing especially that I just haven't had that "Oh I get it" moment yet, so it's ...
7
votes
2answers
611 views

OSPF on ASA 8.2 not advertising /32

We have set up OSPF between our 2 ASA 5540 running in Active/Passive and our Internet provider's Juniper routers. We would like to advertise routes based on the content of an ACL through a route-map : ...
9
votes
1answer
13k views

ProCurve CPU at 100% for several minutes after reboot

I have been doing firmware upgrades in HP switches. Two different models have been upgraded: ProCurve Switch 5406zl Intelligent Edge (J8697A): upgraded from K.15.06.0008 to K.15.12.0012 HP 2520-24G-...
3
votes
0answers
426 views

Policy Based Routing (not matching packets) - Virtual Template

I have this configuration runnning : Larger image I tested the policy based routing int the lab using two linksys router acting as ppp clients of the Cisco 7206VXR and another linksys emulating the ...
6
votes
2answers
11k views

Cisco 6509 Supervisor Card Slot Boot Failure

We recently had a sporadic reboot of a distribution switch for an unknown reason. No recent hardware/software changes have been made. Our log files don't indicate anything leading up to the incident. ...
5
votes
1answer
413 views

Force fraffic between PPPoE users to pass through traffic management device

I would like that traffic between pppoe users passes through a traffic management device as showed below I have evarything working, i mean, users have ppp session and they have internet access via a ...
16
votes
3answers
10k views

mtr output with high packet loss on one hop

I'm investigating a complaint of poor performance from an end user accessing a site I help maintain. I have these two mtr outputs to the end user, the first from the site: ...
4
votes
1answer
2k views

CRC & Align Errors on D-Link switch, network down

I have network topology: (room 3) D-Link DES-1024D | | (room 2 MAIN) (room 4) Baseline 3COM Switch 2948-...
9
votes
1answer
2k views

Prefixes with aggregate labels not fully tracerouting across MPLS core

I have two routers, A (Cat6500 w/SUP720-3BXL, IOS 12.2(33)SXH4) and B (Nexus 7K w/SUP1, NX-OS 5.2(4)), separated by several hops across an MPLS core, each with VRF ABC. Router A has two directly ...
6
votes
1answer
3k views

VPN Connection: Can ping printer but not server what is blocking things?

I have a VPN set up between several offices. All but one work fine. With one office, I can ping the printer 192.168.45.30 but not a server 192.168.45.242. Well, I say I can't but when the server was ...
9
votes
4answers
366 views

Recording latency between a controlled startpoint and uncontrolled endpoint

This might be a very basic troubleshooting question, but it's worth asking to make sure I'm testing things the correct way and interpreting results effectively. I have a controlled start point (a ...
-1
votes
1answer
161 views

DSL-RAM - Bandwidth Problems [closed]

I have an ADSL2+ (Annex B) line, which uses Rate-Adaptive-Mode. It synced fine with 6000/600 kBit/s down/up for 2 years, which resulted in around 6/0.6 MBit download/upload-speed in my LAN. Now, since ...
9
votes
5answers
10k views

Monitor specific traffic type on a Cisco router

Is it possible to monitor a specific traffic type going through a cisco router? (like monitoring via wireshark) Ex: I want to monitor http traffic specifically that is passing through a router. (or ...