Cisco Switching/Routing :: 2610 Configured IP Addresses On Interfaces

Feb 10, 2013

I'm working on my CCNA.  I purchased an old router 2610 with two ethernet ports.  I configured the IP addresses on the interfaces and added the default gateway.  I configured NAT to go out my ATT DSL router to the internet.  With the 2610, I'm able to ping the back end or internal DSL router, but I can't ping the front end, external router, or out to any internet site such as google. 

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Cisco Switching/Routing :: 2610 - No Internet Access?

Mar 2, 2012

I have a Cisoc 2610 connected to my network, 1 Ethernet port and a WIC-2T card.  I have ther serial connection to the main router and the ethernet going to the switch. I can ping all device throught the network...but the 2610 can't ping any outside address (no internet connection).  I have the internet connection going through my 3745 (which the 2610 is connected to via serial cable).  I put a default route into the 2610 but still no luck.
Here are the running configs:
version 12.3
service timestamps debug uptime
service timestamps log uptime


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Cisco Switching/Routing :: 2610-non Responsive Device

Nov 16, 2012

I hope I'm posting this in the correct place. I have a 2610 router and on starting it up i get this and only this,

"System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
Copyright (c) 1999 by Cisco Systems, Inc.
TAC:Home:SW:IOS:Specials for info"
thats all and exactly what is displayed on the console screen the device is none responsive.

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Cisco Switching/Routing :: 2610 Router What Speed Is Built In Ethernet Port

Oct 23, 2011

I have a 2610 router. How can I tell if the built-in ethernet port is only a 10BASE-T or if it's a 10/100 port?  Is there a "Show" command to give me this information or did it only come one way?  I have found conflicting information on this :-(  If it's only 10BASE-T, can I upgrade it to 10/100?

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Cisco WAN :: 520 IP Addresses Not Be Configured On L2 Links

Apr 18, 2011

I purchased a Cisco 520 and am trying to set it up on my home network.Its ADSL PPPoA for WAN.I am trying to setup 2 LANS. One General Network,One DMZ for webhosting.Now, since this router has 4 ethernet ports, i assumed i did not need VLANS. Except when i try configure an interface with an IP address i get this error: % IP addresses may not be configured on L2 links.Now. Ive looked around on the internet about this error. And it seems that since these interfaces are not Layer 3 interfaces,they need to be associated  with VLANS.This would be OK. Except this requires an IP address on an interface on the router! Back to square one.

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Cisco Firewall :: Can ASA5510 Be Configured To Use 2 Outside Interfaces

Feb 12, 2013

I am trying to determine if this is possible or not.  I have tried several configurations and I can only get half of it to work.
LAN ( =====>                      <===== OUTSIDE (T-1)
DMZ ( ====>                      <===== BACKUP (DSL LINE)
The Cisco ASA5510 currently is configured with the following interfaces: inside, outside backup, and dmz.The backup interface routes to the internet via a DSL modem, it normally is not active.The outside interface routes to the internet via a T-1 line.The inside interface is our local LAN and the DMZ has our email server on it.I am wondering if there is a way to configure the ASA5510 so all internet traffic from the inside LAN goes only through the DSL modem and all the DMZ traffic only goes through the T-1 line.  No inside traffic (inbound or outbound) should go through the T-1.  No DMZ traffic (inbound or outbound) should go through the DSL line.
I can get the LAN to use the DSL line with no problem, but the DMZ to T-1 side causes reverse-path errors.I am not looking for redundancy or failover protection.

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Cisco Switching/Routing :: Can 3560E Be Configured To Do VRF

Feb 19, 2012

I have a few 3560E running Ver 12.2(50)se2.  Can these boxes be configured to run VRF.  I see a "sho IP VRF" option, but I do not see it available when under config t.  Do I need to do a IOS upgrade to be able to configure VRF?

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Cisco Switching/Routing :: 6509 PBR Configured With Missing ACL

Apr 1, 2012

We have a working PBR route map on a 6509 switch and a 3750 switch, each in different locations.On both devices, the route-map is configured to match on one of multiple ACLs, then set the next hop to a directly-connected IP address, like so: [code]

When copying in the ACL contents for "ACL20", they were accidentally copied in to the ACL1 list, and ACL20 was never created. Shortly after this was done, the next hop router went unreachable in both locations. Pings failed and the 6509 and 3750 each lost the EIGRP adjacency to the router. After troubleshooting, I removed "match ip address ACL20" and connectivity returned.
My question is...if a PBR route-map tries to match on a non-existent ACL, what happens? Does it mark the next hop unreachable (even though it's directly connected) or does it match for ALL traffic and send *everything* there (thus, making it appear unreachable, as if a broadcast storm was happening)?

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Cisco Switching/Routing :: VTP Server / Domain Configured On 6509

May 14, 2012

In the following scenario, how will the 2950/2960/2960S series behave:
- VTP server/domain configured on a 6509
- A access switch (2960) currently configured in transparent mode with all VLAN it requires
Will the switch drop any traffick if we change it from transparent to client mode if the VTP server has the exact same vlans defined as the access switch had when it was in transparent mode?

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Cisco Switching/Routing :: Create Stack With 2960S Already Configured

Mar 5, 2013

I have an 2960S all configured, with vlans, ports configurations and others.Now, I bought other 2960S and two stack modules to create a stack with these 2 switches.We call:

-Switch1 (I have configured and in production)
-Switch2 (New switch, no configured)
Can I connect these two switches in stack without lost the configuration of my Switch1 and no turn-off this switch? Does not stop the users access?

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Cisco Switching/Routing :: No Virtual LANs Configured On 6500

Feb 14, 2012

I've created the VLAN on the Database but it tells me that there are no VLANs configured when i issue the command. Both VLAN 110 and 111 status are down, down.. Below is my config:
Building configuration...

Current configuration : 15817 bytes!upgrade fpd autoversion 12.2service timestamps debug uptimeservice timestamps log uptimeno service password-encryptionservice counters max age 10!hostname Router!!no aaa new-modelip subnet-zero!!!ipv6 mfib hardware-switching replication-mode ingressvtp domain Marinersvtp mode transparentmls ip multicast flow-stat-timer 9no mls flow ipno mls flow ipv6no mls acl tcam share-globalmls cef error action freezeno scripting tcl initno scripting tcl encdir!!! !!!!!!!redundancymode ssomain-cpu  auto-sync running-configspanning-tree mode pvstno spanning-tree optimize bpdu transmissiondiagnostic cns publish cisco.cns.device.diag_resultsdiagnostic cns subscribe cisco.cns.device.diag_commands!vlan internal allocation policy ascendingvlan access-log ratelimit 2000!vlan 110name Data!vlan 111name Voice!vlan 112name Video!------------Output


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Cisco Switching/Routing :: 881 Configured With HTTP Access Supports GUI

Aug 21, 2011

I have cisco 881 and configured with http access, but when i try to open in browser it's shows blank page. Is the Cisco 881 supports GUI ?

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Cisco Switching/Routing :: What Is Heat Dissipation Of C6509-E Configured

Sep 10, 2009

I am trying to figure out what is heat dissipation of a C6509-E configured as follows:
1 x WS-C6509-E-FAN
1 x VS-S720-10G-3C
1 x VS-F6K-PFC3C
8 x WS-X6748-GE-TX
8 x WS-F6700-DFC3C
2 x WS-CAC-6000W
I have tried two ways: 1) the power calculator and 2) manual calculation using the C6500 installation guide.
1) The power calculator says 13630 BTU/h
 2) Manual calculation says: [code]
The there should be also the two PS in the picture, and the new total should be: [code] Well, 62711 BTU/h looks quite a bit too much and I think that the heat dissipation of the power supply should't be considered in the calculation.Isn't it an item that takes power from the grid and that generates heat according to its efficiency as the other modules?

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Cisco Switching/Routing :: 2900 Duplicate System ID Configured In Ip

Feb 24, 2013

Trying to apply  this config  to a 2900 router and getting this error message. [code] This works ok in in a 2800 router using 12.4(25d) spservices IOS
Not working on 2911 using 15.2(3)T2 ipbase image.

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Cisco Switching/Routing :: Test Multicast Between VRFs Configured On Nexus 7Ks?

Jan 11, 2012

We are trying to test multicast between VRFs configured on Nexus 7Ks. Two Nexus 7Ks are configured for VPC. Multicast Server is in one VRF where as Receiver is in another VRF. The two VRFs are connected to each other via Checkpoint Firewall (Active/Active cluster in unicast mode). All routes have been established and connectivity tested between multicast server and receiver using ICMP.Using, windows mcast.exe multicast stream is generated from server (in one VRF) intended to be received by receiver (in second VRF). Every time, only one multicast packet is received by the receiver and rest all packets are being dropped. Server and Receiver are VirtualMachines configured on VMWaresame chassis which is connected to two Nexus 5Ks (VPC configured).

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Cisco Switching/Routing :: Jumbo 9000 Packets Configured But Not Working?

Feb 23, 2012

I have a switch that I have configured for jumbo packets, but they don't seem to be functioning. I have set system mtu jumbo 9000. The hosts are connected via 2x EtherChannel links. The hosts are jumbo frame enabled, and can ping their own local address using jumbo packets & do-not-fragment flags on the pings. They cannot, however, ping each other or the switch that way - it always says that the packet requires fragmentation. I know the attached machines (they're all VMs) and virtual switches support jumbos because I can ping within the virtual interfaces of the VMs. It's just traffic that goes over the switch that fragments.The switch is a WS-2960G-48TC. Here are the various outputs, with a section of config at the end.
hrnacancwtdevs3#show system mtu 
System MTU size is 1500 bytes
System Jumbo MTU size is 9000 bytes
System Alternate MTU size is 1500 bytes
Routing MTU size is 1500 bytes


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Cisco Switching/Routing :: 3750 Switch Configured - Only Can Ping Gateway

Sep 27, 2012

how my switches are configured, a cisco 3750 and a cisco 4506.[code] i can ping the gateway from the 3750  however cannot get anything past that or enything to it.

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Cisco Switching/Routing :: 4506 Mac Address Disappears From Configured Port

Aug 19, 2012

I have two Cisco 4506's running cat4500-ipbase-mz.122-50.SG3.bin. Periodically, when attaching a new workstation to these switches the Mac Address of the device disappears off the port when the device is connected or the port is configured. The only way to correct the issue is to do a hardware reset on the blade or reboot the switch. After resetting the blade or rebooting the switch the devices will start showing up on the port and connect. This does not effect devices that are already connected to the switch, just newly added devices
Both switches are populated with WS-X4148-RJ45, WS-X4148-RJ45V and WS-X4248-RJ45V blades. It doesn't matter which blade the new device is being connected to. I believe that this may be a "Bug" but have been unable to locate one.

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Cisco Switching/Routing :: Configured Port Security On 2960 Switches

Feb 18, 2013

I configured port security on my 2960 switches with the following commands: [code]
The problem is that when I should change someone's PC, first I disable port-secirity, then I clear all the mac addresses learned on the interface, then I plug the new PC and enable port-security. The new PC couldn't connect to the network and it's mac address has not be learned on the interface. Why?Which commands should I use to clear an old mac address and enable port-security with the new mac address.

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Cisco Switching/Routing :: How Many Port Channel Can Configured In Switch 3750 X

Apr 23, 2012

I would like to know how many port channel can i configured in the switch 3750 X ? and if there is a limitation by IOS ?

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Cisco Switching/Routing :: 1841 - Static And Dynamic NAT Configured But Not Working

Mar 21, 2013

I have configured Cisco 1841 router PAT buts its not worked, find the below configuration details,
In LAN  interface
Interface gigabit Ethernet 0/0
no shutdown
Similarly I have configured static and dynamic nat but its not works in my customer place.

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Cisco Switching/Routing :: 1841 / Routing Through Sub-interfaces Fails?

May 31, 2013

I have a problem accessing my wireless router through VLAN sub-interface on my Cisco 1841 router. My hardware:
Cisco Catalyst 2960 switch ( /24)
Cisco Catalyst 3550 switch ( /24)
Cisco 1841 router ( /24)
Asus RT N66U wireless router ( /24)
Here's my network topology:
I have two VLANs - 10 and 20. 2 DHCP pools are configured on 2 1841's interfaces - /25 and with default router sitting on and respectively. No issues with obtaining IP address from any of those pools.Laptop connects to L3 3550 switch (switchport access vlan 10), which, in turn, connects to 1841 router through trunk (with VLANs 10 and 20 allowed).3550 is connected to 2960 through trunk with VLANs 10 and 20 allowed.Wireless router is connected to 2960.I can successfully ping my wireless router and outside world from 1841 from fa0/1 interface, but not from fa0/1.10 or fa0/1.20 sub-interfaces -  all packets got dropped. My laptop can obtain IP from both pools (depending on port I connect it to), but can't ping my wireless router and anything beyond it.
I attach my configs:Cisco Catalyst 3550:interface FastEthernet0/1 switchport trunk encapsulation dot1q switchport mode trunk switchport port-security mac-address sticky speed 100!interface FastEthernet0/2 switchport trunk encapsulation dot1q switchport mode trunk!interface FastEthernet0/3 switchport access vlan 10 switchport mode access!interface FastEthernet0/4 switchport access vlan 20 switchport mode access!Cisco 1841:
ip dhcp pool Vlan10DHCP network default-router dns-server domain-name home.local
!ip dhcp pool Vlan20DHCP network default-router dns-server lease 0 12
interface FastEthernet0/1 ip address duplex auto speed auto!interface FastEthernet0/1.10 description VLAN10 Sub Interface encapsulation dot1Q 10 ip address!interface FastEthernet0/1.20 description VLAN20 Sub Interface encapsulation dot1Q 20 ip address!
Routing table on 1841:


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Cisco Switching/Routing :: Catalyst 6500 / Port-Channel Down But Correctly Configured

May 23, 2012

I has a issue about etherchannel beetwen 02 Catalyst 6500 switch, i need your comment about it. if you had any similar experience:
1.- On Catalyst Switch 6500-1:   I configured interface port-channel 4 and associated it to G6/29 and G6/30 interface Port-channel4description IUU1_Gn1_HLIMSGSN01_Port_channel_6_29_6_30switchportswitchport trunk encapsulation dot1qswitchport trunk allowed vlan 406,408switchport mode trunkswitchport nonegotiatelogging event link-statusload-interval 30mls qos vlan-basedmls qos trust dscp!

2.- On Catalyst Switch 6500-2:  I configured interface port-channel 4 and associated it to G6/29 and G6/30
interface Port-channel4
description IUU2_Gn2_HLIMSGSN01_Port_channel_6_29_6_30
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 407,409

and i see output "show interface Po4A" up up on switch-1, "show interface Po4B" up up on switch-2   
5.- In the show running-config not appear configured Po4A and Po4B. it only show on outputs
6.- Po4A and Po4 was not configured on neither switches, my question is why appear Po4A and Po4B on switch-1 and switch-2 respectively?  and why Po4 appear in down down.
7.- I solved this issue by shutdown and not shutdown to the interfaces on both routers, currently all is OK.

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Cisco Switching/Routing :: Router Is Connected To Switch 2960 Configured As DHCP SNOOPING

Sep 3, 2012

We have a DHCP SERVER implemented in a cisco router 2610.This router is connected to a switch cisco 2960 configured as DHCP SNOOPING. At the switch appear the next log message: [code] The ip address: belongs to DHCP SERVER configured at router cisco 2610. What to do so these log messages does not appear any more? Do I need to do some configuration changes at some switch or router?

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Cisco Switching/Routing :: Same VLans 20 And 21 At WAN And LAN Interfaces

Dec 12, 2011

I have VLans 20 and 21 set by ISP for Voice and Data respectively.What will happen if I already have VLans 20 and 21 in my Local network?

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Cisco Switching/Routing :: Catalyst 2960g Interfaces Going Up And Down?

Jun 14, 2012

i have a cisco catalyst 2960g and for some reason out of the blue, some interfaces go down and then up. It started doing it after a power cycle.

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Cisco Switching/Routing :: 2911 - Allow Traffic Between Two LAN Interfaces?

Nov 15, 2011

I have a 2911 router. One interface is configured external (WAN) and two interfaces are configured on separate internal private subnets. What is the configuration to allow all traffic in both directions between the two internal subnets?

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Cisco Switching/Routing :: 3500XL / VLAN Interfaces Will Not Come Up

Jan 9, 2013

I am using an Old 3500XL and I simply created a
interface VLAN 100
Description ***********
ip address
no ip directed-broadcast
no ip route-cache
no matter what I do i cannot get it to come up, the rest of the switch is default config, I know I am just forgetting something, But I don't know what?

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Cisco Switching/Routing :: Output Errors On N5k 10G Interfaces?

Jan 9, 2012

today I witnessed a cisco n5k that stopped playing fair. For a yet unkown reason several interfaces started to show output errors all begining within the same second. While i instantly thought this would be a wiring issue I began to ask myself what an output error actually means. Google usually brings up output drops, not regular output errors. So what is it and how can a 10G fiber interface even detect that there is a problem without receiving what it was sending?

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Cisco Switching/Routing :: 3750 Not Handing Out IP Addresses

Jan 10, 2013

We have a 3750 running IOS ver 12.2 (44) SE, it has performed great and we have never had a problem with it. However we have noticed that when we had an outage some of our Wireless APs didn't come up as they get DHCP from the 3750. The DHCP scope said IP was depleted although there were IPs to give. We had to delete and recreate the DHCP Pool. However two days later we got the same problem and then had to do the same thing over again.

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Cisco Switching/Routing :: 3750 - How To Hide Mac Addresses

Jun 12, 2013

I Lease fiber between two locations, My operator limiting number of MAC addresses to 8 macs. Is there any possibility using some feature available in the Cisco 3750 switches to (hide mac addresses) encapsulate traffic witch flowing via operator network ?
I need to send data between locations with 1Gb/s speed. If 3750 switches can't do that, which models of switches 1 or 2U can do it. May Metro switches ?

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Cisco Switching/Routing :: 3750 - Two Different MAC Addresses On Same Switchport

Feb 16, 2012

I have Catalyst 3750 running IOS version c3750-ipservicesk9-mz.122-55.SE.bin.  I have an access port that connects to a Redhat Linux version 5.4 64 bits machine.  When I perform a "show mac address-table interface g1/0/3" where the redhat machine is connected to, I see two mac addresses on this access port.  One of the mac addresses, 0025.9006.4898,  belongs the the redhat machine.  the other mac address, I have no idea where it comes from.  I tried to perform clear mac address-table dynamic g1/0/3 several times but it does not work either.

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Cisco Switching/Routing :: SG 100-16 Switch - 2 DHCP Addresses

Jan 11, 2012

I currently have a the following configuration and am unable to get more than 2 DHCP addresses for the devices connected to the Cisco new SG 100-16 Switch.The AP have no trouble handing out DHCP to the wireless clients, but we are unable to get the SG 100-16 to be able to do the same thing to wired clients.  It is currently connected to the 2960-8 in port 1.  We can get 2 devices connected without a problem, but the 3rd machine and beyond do not work.  Also, setting up a static IP does not work.  Using a static will not even allow us to ping or tracer back to any devices beyond the SG 100-16.

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