Cisco Switching/Routing :: 2800 / Clear Arp Table Every 5 Seconds?

Feb 19, 2012

I am in need to have the arp table cleared every 5 seconds or so on a 2800 router.  I was wondering how I might be able to accomplish this.

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Connected To Clear Lose Signal Every Few Seconds?

Jun 26, 2011

Connected to "clear" lose signal every few seconds-WHY! just lost my signal again!

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Cisco WAN :: Clear IP NAT Translation Static 2800

Jul 19, 2011

I am trying to change a static nat entry from this:

ip nat inside source list 1 interface Dialer0 overloadip nat inside source static tcp 192.168.0.246 25 interface Dialer0 25ip nat inside source static tcp 192.168.0.246 80 interface Dialer0 80ip nat inside source static tcp 192.168.0.246 443 interface Dialer0 443

to

ip nat inside source list 1 interface Dialer0 overloadip nat inside source static tcp 192.168.0.247 25 interface Dialer0 25ip nat inside source static tcp 192.168.0.247 80 interface Dialer0 80ip nat inside source static tcp 192.168.0.247 443 interface Dialer0 443
 
I have tried various methods from exec mode clear ip nat translation *
 
no ip nat inside source static tcp 192.168.0.246 443 interface dialer0 443 But I am getting cisco2800(config)#%Static entry in use, cannot remove.

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Cisco :: 4503 How To Clear MAC Address Table By SNMP

Jan 23, 2012

I'm looking for a SNMP set command that clear the MAC Address table on a Switch Cisco 4503.

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Cisco WAN :: WS-SUP720-3B - 2 Full BGP Table - Maximum Routing Table?

Jan 16, 2013

In datasheet of  WS-SUP720-3B - link- was said that are only supported around 256K routes (fib?rib?).With this value I can't get 2 full bgp - that is around 850K ..
 
The supervisor is that control this or just memory ? I said this because I have a 7204-npe-g1 whith 2 fullrouting and 1G of and he are ok..

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Cisco Switching/Routing :: 1900 - Clear DF Bit And Policy Based Routing

Jan 8, 2012

I've been implementing a setup where a remote office has a Cisco 1900 router. There are 2 GRE/ IP SEC tunnels to the headquarters, 1 over public internet, 1 over a private cloud. Because of some MTU issues we have to clear the DF bit for some of the traffic, but we also want to use PBR to send https traffic over the "public internet" tunnel and the rest of the traffic over the "private cloud" tunnel. I'm able to clear the DF bit and to do the PBR with route-maps, but I'm not able to implement both functionality at the same time.

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Cisco Switching/Routing :: How To Clear Vty Line On Cat6500

Jun 19, 2012

how to clear vty line?  Please see below. A sh tcp <line number> shows that the TCB is waiting for TCP Process.  The TCP processs TCB is waiting for is SSH.  I believe because of this ssh process still running, the vty line cannot be cleared. 
 
sh users
   Line       User       Host(s)             Idle       Location
   1 vty 0     pf         10.10.20.8                                   9w1d 10.10.1.54
   2 vty 1     pf         10.10.1.16                                35w0d 10.10.1.54
   3 vty 2     pf         10.10.1.16                                 1y14w 10.10.1.54

[code].....

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Cisco Switching/Routing :: 3750 Port-security Will Not Clear

Jun 5, 2012

We have several 3750 stacks across our campus that we are unable to completely clear port security on. We have mac address stick set up on all access ports. When we clear the sticky address on the port, the mac address is removed from the running config like normal, but we keep getting port-security voilations. If port security is taken off the port completely, i.e. no switchport port-security, traffic still doesn't pass the port. Even clear port security across the stack doesn't work. If we try to reload the stack, only the master reboots, and the other switches in the stack lose switch capabilities.

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Cisco Switching/Routing :: 3560E - HSRP Gateway Failover And Routing Table

Nov 12, 2012

We have two Cisco 3560E layer 3 switches at the core of our network. The switches are configured as an HSRP pair and the clients on our network point to the HSRP address as their default gateway. So if CORE-A dies, then CORE-B will pick up the address and the default route for the clients will continue to be available.We also need to specify a few static routes on the core switch to allow us to get to specific networks. Is there a way to do this so that the routes failover in the same way that the default gateway does?

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Cisco Switching/Routing :: RIPv2 Routers Setting Routing Table For R3

Dec 5, 2012

I started using RIPv2 on Packet Tracer. I got two subnets to connect with two routers. After I completed that, I decided to add a third router. How to setup the Routing Table for atleast R3 ?

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Cisco Switching/Routing :: 2911 With IOS Version Is 15.1 - Routing Table Not Updating

Oct 2, 2012

I am using Cisco 2911 & IOS version is 15.1. My problem is that after some days (e.g. 15-20 days), the routing table suddenly stops updating & then I have to enter the default route again to make it up. I am using Track 1 to track default route here. After primary link goes down, the Track is also going down but after coming the primary link up, the track is not coming up. So, I have to add the default route again to make it up.

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Cisco Switching/Routing :: GNS3 - Stub Router Not Updating Routing Table - EIGRP

Nov 14, 2012

We have small which I'm looking to implement and have built this on GNS3.
 
We have:
 
Router A in site 1
Router B in site 2
Router C in site 3
 
Router A and B are connection via a point to point 100M link and from Router C we have a 2 point to point one of which is 5Mpbs and going to Router A and Router B.
 
For Router C to reach Router A network it will go via Router B and these are 100M connection. When the link between Router A and B goes down. Router C should update and start using the 5m route.
 
For some reson, the routes are not updating. I have to do 'clea ip eigrp ne' for the routes to update and if I reload the routers all works well, it seems the problem is intermittent.

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Cisco Switching/Routing :: Filter A Specific Host(s) From OSPF Routing Table On A ASA 5550 (ABR)?

May 22, 2013

I am attempting to filter a specific host(s) from my OSPF routiing table on a ASA 5550 (ABR) using LSA prefix lists.  However, when I look at the other routers in that area, I notice that ALL LSA type-3's are being removed (10 hosts are now missing from the routing table). I have verified the filter is working on the ABR, but I can't figure why ALL hosts/routes that were coming into the area are now being filtered instead of the specific one that I want to filter out.
 
Here is the config on the ABR:
 
prefix-list pdm_pl_000 seq 10 permit 206.253.180.137/32
!
!            
router ospf 1
network 10.0.0.0 255.255.255.0 area 0
network 10.150.10.0 255.255.255.0 area 10
network 10.150.252.0 255.255.255.224 area 10

[code]....
 
The 206.253.180.137 host is actually coming from Area '3'.  Am I doing something that is removing all type-3 LSA's?

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Cisco Switching/Routing :: 3750 Switch Need To Constantly Clear ARP Cache

Aug 19, 2012

We have a 3750x switch with some issues on the arp. Our servers become unreachable for some time, buy when I clear the arp cache, I am able to ping the server again. I have tried adjusting the arp timeout but I don't think doing so would be the permanent solution.

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Cisco Switching/Routing :: Unable To Clear Monitor Session From 6500

Mar 6, 2013

I tried to clear monitor session on 6500 and keep on getting the following error:
 
 %Another session parameters or permit-list is being configured %Please wait for another configuration to complete.
 
how i can go about clearing the monitor session.

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Cisco Switching/Routing :: Couldn't Clear Monitor Session From 6500

Nov 21, 2011

I tried to clear monitor session on 6500 and keep on getting the following error:
  
%Another session parameters or permit-list is being configured %Please wait for another configuration to complete.
 
how i can go about clearing the monitor session.

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Cisco Switching/Routing :: Configure Routing Between 2800 And 3550

Sep 18, 2012

The layer 2 switches are connected to layer 3 Switch via trunks, and routing between layer 2 switch ports with configured SVI's on 3550. All working fine. Now I'm trying to configure routing between 2800 and 3550, I tried connecting both Straight Throught and Crossover cables to the 2800 Fa0/0 and Fa0/1 ports as well as the switchports on 3550
 
No switchport commands are configured however, the lights do not go on for both straight through or crossover cables. I tried connecting 1750 routers but same result. My goal is to have all the VLANS routed to the internet with configuring NAT translation the router.

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Cisco Switching/Routing :: 2960 All Lights Went Orange For A Few Seconds

Nov 3, 2012

I noticed on my new cisco 2960s switches, that all the lights went orange for about 10 seconds then went off again, this was during normal operation, all ports were shutdown at the time apart from a few,the ones that were enabled, the led's went off.

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Cisco Switching/Routing :: Nexus 7000 Errors Every 30 Seconds

Feb 3, 2013

I have a Nexus 7000 pair with Etherchannels connecting to various access switches. 2960's and 3750's.The access switches channel 2 ports together. LACP active mode. One link goes to one Nexus and one to the other. Those connections are a portchannel with vpc configured.Every 30 seconds on every interface connecting to one Nexus I see a FCS error. The errors increment at the same time every 30 seconds. Only on one port. If I shutdown that link and keep the channel up on the other link the errors move. No shut the interface and they move back.This must surely be some Nexus generated packet that the access switch does not recognize/ what is likely to be getting sent at 30 sec intervals to all Channel members on one link ?

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Cisco Switching/Routing :: IP SLA Between 2900 (15.0) And 2800 (12.4)?

Apr 11, 2013

I've problem with IP SLA probes between two different routers.2900 (c2900-universalk9_npe-mz.SPA.151-4.M4.bin) here is set "ip sla responder" only and 2800 (c2800nm-advipservicesk9-mz.124-24.T2.bin) here is set two type of tests "udp-jitter" and "icmp-jitter" - temporary, used to check for availability of 2900 router.As a result, I've what udp-jitter doesn't work at the same time icmp-jitter test is OK.Here are the settings of IP SLA tests
 
ip sla 281
icmp-jitter 172.25.28.1 source-ip 192.168.28.6 num-packets 100
tos 128
frequency 120
ip sla schedule 281 life forever start-time after 00:05:45

[code]...

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Cisco Switching/Routing :: 6509 Mac Table Held

Feb 6, 2013

On the 6509, with normal 67xx cards installed, where is all the mac table held, is it held on the card itself or on the supervisor? And if I use dcef cards, I gather the MSFC copies the mac table to the DFC ?

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Cisco Switching/Routing :: 1812 - Mac Address Table

Jan 11, 2012

Cisco 1812, Version 12.3(8)YI1..What does "none" mean ?Most of mac adressess in cam has specified interface, but several has none.

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Cisco Switching/Routing :: 3750 SNMP Trap Send Every 30 Seconds

Dec 17, 2012

I have a snmp trap sent every 30 seconds from one of my cisco switches (a stack of 3750 to be precise): ccStatusMemberStatusChange. Do you know what it is and why it is sent continuously?

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Cisco Switching/Routing :: Normal CPU Performance For 2800

Dec 11, 2011

Is there any official Cisco reference to describe what is considered to be the highest acceptable production CPU load on 2800 routers? I found the document "Integrated Services Routers G2 - Performance Overview" that states at page 5,Most service providers set their CPU alarms to 60 or 65 percent. Many enterprise customers are comfortable running production networks with CPU around 70 or 75 percent.

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Cisco Switching/Routing :: 2800 Route Filtering

Apr 3, 2012

I have a router with two interfaces what i need to filter the HTTP traffic from one interface and the rest of the traffic through the other on my cisco router 2800.

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Cisco Switching/Routing :: Creating A VLAN On 2800

Nov 20, 2011

I have a problem to create a VLAN with a Cisco 2801.,I need to have base ports FastEthernet 0 / 0 and FastEthernet 0 / 1, in the same VLAN.
Basically I'm trying to switch access redundacion, now I have redundant switches in which I have the servers, but if one of these switches fails, and,coincidentally is where I have connected the router, the server runs out of internet connection.,I idea is to connect the FastEthernet 0 / 0 to a switch, and FastEthernet 0 / 1, to the other switch,but I managed to have these two ports in the same vlan, in order to have a unique IP for both FastEthernet ports,As I can do this?. do is a lot of documents using the switchport command, but this command is not available in my router, I tried different IOS, and nothing.,currently I have the following IOS: c2801-adventerprisek9-mz.124-24.T6.bin

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Cisco Switching/Routing :: Best Way To Block Website On 2800

Nov 26, 2012

I have a 2800 router and tried so many ways to block the unwanted sites on my office network.Like access list ip based, null0 routing and policy map. Faced issues with below config

1. Creating Access-list. very difficulty to block the sites with https those sites will be opend, and we cant block all the IPs
 
2. Creating null0 routing. it also a bit deficult the block maximum sites because we can't fiend all IPs for those sites
 
3. Policy map.. with policy map we can only 1site we can block, but not more than one..
 
I heard that port based routing or port based access-list are the best ways to stop the websites in my local network..for this one i need to map the site to unsued ports then i need to null rouging or need to create the access-list.

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Cisco Switching/Routing :: How To Block Sites In 2800

Nov 23, 2012

I have a cisco 2800 router.. (flash:/c2800nm-advsecurityk9-mz.151-4.M4.bin, Version 12.4(13r)T11) configured DHCP, DNS, NATING and Bandwidth restriction...And to stop some social network [URL] i configured ip route 66.220.144.0 255.255.240.0 Null0 (rang of facebook address) But still i am able to open facebook.com in my network...
 
ADMIN-II_2811#sh run
Building configuration... 
Current configuration : 1812 bytes
!
! Last configuration change at 17:26:33 UTC Sat Nov 24 2012
version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec

[code]....

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Cisco Switching/Routing :: Upgrade IOS On 2800 Router?

Oct 16, 2012

Needing to upgrade IOS on 2800 router from c2800nm-advipservicesk9-mz.123-14.T7.bin to c2800nm-advipservicesk9-mz.124-15.T13.bin.  I noticed ther are several other files on the old code that may needed for booting up router but Im running low on memory.  The other existing files are ;

c2800nm-advsecurityk9-mz.124-3i.bin
securedesktop-ios-3.1.1.45-k9.pkg
  sslclient-win-1.1.4.176.pkg
 
Do I need these files for the upgrade or can i delete them when upgrading to 124-15.T13.bin. ?

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Cisco Switching/Routing :: 2800 / How To Setup Redundancy

Jun 13, 2012

How to setup redundancy on a 2800 series Router so that whenever it fails it will be routed through the MPLS router

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Cisco Switching/Routing :: 2800 Series VPN And PCI Compliance

Aug 21, 2012

I'm trying to turn off SSH version 1 & 2 to pass PCI compliance. Problem is, I cannot touch the VPN link between the two offices. I'm afraid the PKI certificate used for the VPN will be deleted if i zeroize the RSA key which seems to be the only way to stop the router responding on port 22. 
 
Here is the stuff from the running config related to the crypto map: 
crypto isakmp policy 1
encr 3des
authentication pre-share
group 2
[ code].....
 
I'm only CCNA so I'm not even sure if the certificate or RSA key is being used for the VPN link, but I can't tell from the running config that zeroizing it would be a good idea and not break the VPN. I'm open to other ways of disabling SSH, as we are able to just connect using a console cable. But it looks like denying port 22 with an access-list doesn't even stop the router from responding to the port.

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Cisco Switching/Routing :: 2821 Bogus Arp Table Contents

Jul 23, 2012

My 2821 router has an arp table with the wrong ip to Mac mappings.  The impact is that I can reach any host in the 10.1.1.1 subnet.   I can reach hosts in the 192.168.35.0 just fine. [code] It is as if the 192.168.35.1 device is answering all arp requests as a proxy arp or something. Clear arp-cache nor clear ip arp on my 2821 have any affect. 

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Cisco Switching/Routing :: 6500 Not Showing Mac Address Table

Apr 8, 2013

we have 6500 cisco switch as a backbone switch in universty. When ı want to look mac addres table , it does no show all mac address.ı mean if ı type ;show mac address-table there are not all mac address.

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