Cisco WAN :: 1841 / Effect Of Assigning Wrong IP To Router Interface?

Dec 21, 2010

What are the possible effects of assigning an invalid address like 172.22.0.0 255.255.255.252 to a router interface. The 1841 router accepted the address?

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Cisco WAN :: 1841 Router - HWIC Interface Card - Cannot See Interface In Configuration File

May 9, 2012

i have a 1841 cisco router and i recently purchased a 1 port HWIC wan interface card. My problem is that I cannot see the interface in my config file. Is there something i am missing?

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Cisco VPN :: PIX 525 Routing To Wrong Interface?

May 2, 2011

PIX 525 6.3(4)120
 
I am trying to allow clients coming in from my "DMZ6"  interface with source IPs from the subnet 192.168.2.0 /24 to ping and  access hosts on my "DMZ1" interface with destination IPs in the subnet  10.5.11.0 /24. I think I have the associated static NATs and the ACLs  set up to allow this to happen. What I have noticed from syslog messages  is that the PIX is trying to build the TCP connection to the "Inside"  interface, rather than to DMZ1. Even though the destination host  (10.5.11.12) is directly connected on DMZ1, the PIX is still trying to  send the traffic to the "Inside" instead. I tried adding a host route to  force 10.5.11.12 /32 pointing to DMZ1 and the PIX still tries to send  the packets Inside. This only seems to happen when I try to go from DMZ6  to DMZ1. If I try to access hosts located in DMZ3 for example, which is  also a directly connected interface on the PIX, it appropriately builds  the connection to DMZ3. Here are the pertinent rules. Why would the PIX want to build the connection to the Inside,  even though it knows that the destination host IP is directly connected  to DMZ1?
 
ip address DMZ1 10.5.11.1 255.255.255.0
ip address DMZ6 10.5.16.1 255.255.255.0
ip address inside 10.5.18.17 255.255.255.240

[Code].....

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Cisco WAN :: Terminate New 10M Link Via Ethernet Interface On 1841 Router?

Dec 19, 2010

We want to terminate new 10M link via Ethernet interface on Cisco 1841 router. We have free Gig port on the router. We also have HWIC-FE module inserted in the router. However, our implementation team said that Cisco 1841 doesn't support 10M link. It is not designed to cater to such high Bandwidth.

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Cisco Firewall :: ASA5520 Routing Packets To Wrong Interface?

Apr 17, 2012

We have an ASA5520 running ver 7.0(8), nat-control is disabled. On the "outside" interface we have a closed network which is publicly addressed i.e. no access to Internet. We also have two Vlan interfaces on a trunk connection i.e. "inside" interface (Vlan7) and "dmz" interface (Vlan802). Traffic from the "outside" to "inside" is statically NAT'd such that the public IP is translated to a private IP when accessing the "inside" interface. However, our OSS servers on the "dmz" interface need to be able to receive packets from the public IP addresses on the "outside" . All is okay with the outside to inside traffic and traffic initiated from the OSS servers on the "dmz" to the outside works okay (snmp gets etc) i.e. the servers receive reply packets from the public addresses of the outside devices.
 
However, traffic that originates on the "outside" interface (snmp traps etc) which is destined for the "dmz" is actually being routed to the "inside" interface and therefore the public source address is being NAT'd by the static NAT command. The access-list "in_on_outside" has relevant entries to allow connectivity from outside to dmz, we have tried a static nat command (outside, dmz) to maintain the public addressing but this made no difference and also a nat exempt. With ########nat-control disabled - do I still need a translation or NAT exempt for the "outside" <> "dmz" traffic flow, if so how should this look ?

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Cisco WAN :: C1921 One Way Multicast And Wrong Interface Info In Show Ip

Nov 5, 2012

C1921, running version 15.1(4)M2, with licence for "IP base" feature set only.Trying to pass multicast via a PPTP VPN from a Windows XP machine to work around a non multicast-aware WAN link

1. With the IP Base feature set I am able to create a plain PPTP VPN without any encryption; the Windows XP machine can bring it up and unicast data passes through it OK in both directions.
 
2. But when trying to send multicast, only one-way traffic is observed:i. Windows XP host on far end of PPTP VPN and a local PC both running old Microsoft tool "MPING.EXE", sending and listening for traffic on the groiup 225.100.101.102i. The distant host receives and echoes back the packets received from the local machine + sending its own (confirmed with Wireshark running at the far end)ii. But the local machine directly connected to the C1921 router does not hear any packets from the far end; Wireshark shows only the ones it is sending.
 
3. Group status ("show ip igmp membership") as far as the C1921 is concerned shows both ends (192.168.50.10 (local end) and 192.168.50.201 (distant end via the PPTP VPN)) joined to the group [code]

4. But "show ip mroute" for that group shows an error; for the source on the far end of the PPTP VPN (having the IP address 192.168.50.201), the source interface is incorrectly shown as GigabitEthernet0/0 (should be Virtual-Access2.1 for that PPTP VPN) and the outgoing interface is shown as Virtual-Access2.1 [code]

5. I have tried adding static mroutes and messing about with parameters for the virtual-template interface for the PPTP VPN, but the problem remains. And if I put another local PC onto a different Ethernet port of the router, the multicast traffic does flow both ways - so the issue is solely with the PPTP VPN.After a week of head-scratching I am getting more and more convinced that it's a bug... but wonder if it is already-known, has a workaround, or a fix in newer firmware?

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Cisco Switching/Routing :: 1841 - Router's LAN Facing Interface Becomes Up / Down Frequently

Nov 14, 2011

We have a 1841 Cisco router for one of our remote sites and we have the GRE over IPSec tunnel on it (with our datacenter router) for the connectivity. The LAN facing interface becomes UP/Down (status 'UP', Protocol 'Down'). When I login the router and 'shut' and then 'no shut' the interface, the interface becomes UP and everything starts to work. Traffic starts to flow across it. But after some time, some hours or sometimes some days, the interface is again back to up/down status. The router is connected to  a non-Cisco switch. I do see some CRC's increasing very slowly, but apart from that there seems nothing wrong with the interface in sho int fas0/0 command:
 
!
RTR01#sho int fas0/0
FastEthernet0/0 is up, line protocol is down
Hardware is Gt96k FE, address is 0026.cb91.ee48 (bia 0026.cb91.ee48)

[Code]....

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Does Router Effect Internet Speed

Sep 17, 2012

My internet provider give me 600kbps which is 0.6mbps i believe Wireless B's maximum speed is 11mbps N's is 300-450.Will I have any diffenece on internet speed between b and n? I use telus from vancouver they say I have 6mbps speed internet.

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Cisco WAN :: Does IP Default-gateway Have Any Effect On L3 Device Such As 2811 Router

May 21, 2013

Does ip default-gateway have any effect on a L3 device such as a 2811 router? I always thought that on a L3 device the default route would supersede any such command assuming it is accepted.
 
We have a client device that cannot be reached for managment directly and wanted to add that statment only if it might work.

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Linksys Wireless Router :: E1000 / QoS Policies Don't Seem To Be Taking Effect

Mar 10, 2012

determine whether I have QoS properly setup on my router, and why the rules do not appear to be taking effect.ISSUE We have a couple of laptops, smartphones, and a Wii on our home network. One device, my roommate's laptop, is a real bandwidth hog. It's connected (via internet, not VPN) to a work server and is frequently downloading and syncing large datafiles and media files.Unfortunately, when that laptop is downloading the other devices either cannot connect to the internet without timing out, or is VERY slow, for example pulling up websites like google.com. When that laptop is offline, everything works fine. It seemed like enabling QoS would resolve our problem.\

SETUPLinksys E1000, latest firmware (v2.1.02), using WPA2-Personal security.

We first tried enabling QoS and setting the MAC address of the downloading laptop to "low" priority and all others to "medium". No luck - the downloading laptop still seems to be hoarding the bandwidth.We also tried adding the download application to the list and setting the port to "low". Still no luck.We added a new application called "web" and set port 80-81 to "high", but that didn't work.We then disabled WMM support. No dice. The other devices still can't connect while my roommatte's laptop is syncing.We've fiddled around with the settings a bit, but no matter what, it looks like the QoS rules are not being applied.And is it acceptable to have multiple categories (MAC and application) in the QoS rules? 

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Cisco Firewall :: 1841 NAT Out One Interface But Not Other With IOS?

Feb 27, 2012

I am trying to figure out how to use a Cisco 1841 IOS router to take traffic from one interface and source NAT it out towards the Internet on one interface and at the same time NOT perform NAT when sending the traffic towards a different routed interface. 
 
Here the RemoteSite has connectivity back to the MainCampus, but there is no need to NAT traffic from the one site to the other.   They share the same umbrella of address space.   However, the RemoteSite needs to have its Internet-bound traffic NAT'ed out to the Public Internet via a third interface.  I know that I could just NAT everything out from the Remote Site and map the traffic back onto the same address space for intra-campus communication, but I'd rather avoid that and just NAT where I need to NAT it to the Internet.
 
I do have a caveat here:   in the event that either the MainCampus or the Public Internet interfaces go down, I would like to failover traffic from the downed link to other good link.  For example, I want to NAT all traffic (including "intra-campus" traffic) out via the Public Internet if the direct link to the MainCampus is down.  For the other example, if the Public Internet direct link is down, I would just send out all traffic without NAT towards the MainCampus.

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Linksys Wireless Router :: E200 Installation Effect On DSL Connection In Desktop?

Jan 31, 2013

I have  desktop and two laptops. I have DSL connected with my desktop only. If I'm gonna install E200 so I can use my laptops in internet, wouldn't it effect my dsl connection in my desktop?

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Cisco WAN :: 1841 ISR Sub-interface With VLAN Tagged

Dec 7, 2010

I am trying to roll out a new internet router.  The problem I am faced with is the LEC only supports VLAN 1227 and greater, specifically they are assigning me VLAN 2528. I am able to create the sub-interface and setup dot1q encapsulation for VLAN 2528, but the vlan database does not have the ability to add VLAN 2528 to it so I am unable to get layer 2 up and going, thus preventing me from getting the implementation done.

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Cisco WAN :: Input Errors On 1841 LAN Interface

Nov 4, 2011

I use an 1841 router as an internet facing firewall with a 10MB MetroE connection.  Lately users started reporting slow internet download speeds and web pages timing out.  Bandwidth reports do not show the link as being saturated so I looked at the interfaces on the 1841.   The interface connected to the provider shows OK as far as errors but the LAN side of the router shows steadily increasing input errors.  It doesn't show any other errors, no CRC, frame, runts, giants or overruns, just generic input errors.  What type of errors are those?  Nothing is being logged on the console.
 
I moved the connection to another switch ports and the errors continue.  I switched it down to 10MB and also changed the switch and the errors slow down but don't stop.  Interestingly, the switch side never shows any errors.  What can I do here?  I guess it can be a bad interface but that is such a rare thing that I am hesitant to replace the router.

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Cisco WAN :: 1841 - Show DSL Interface Command

Jul 15, 2012

I'm trying to troubleshoot one of our site today and can't seem to issue the show dsl interface command on a 1841 router. Does the same command is used for SHDSL or am I running with an IOS bug?
 
#sh dsl? 
% Unrecognized command
 
#sh ver
Cisco IOS Software, 1841 Software (C1841-BROADBAND-M), Version 12.4(15)T7, RELEASE SOFTWARE (fc3)
Technical Support: {URL}
Compiled Wed 13-Aug-08 15:42 by prod_rel_team
 
#sh inv 
NAME: "chassis", DESCR: "1841 chassis"
PID: CISCO1841         , VID: V05 , SN: FHK13212639
 
NAME: "WIC/HWIC 0", DESCR: "WAN Interface Card - ATM (With multi line G.SHDSL module)"
PID: WIC-1SHDSL-V3     , VID: V02 , SN: FOC132041KD

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Cisco WAN :: 1841 - SNMP OID For Interface Utilization

Jan 13, 2013

I have a cisco 1841, Im trying to write an app which will get the Interface Utilization on my 2 atm interfaces and fast eth 0/0 interface.
 
I’ve been reading up and have got as far as downloading the codeplex snmp library project. I’m using the snmpget app to get details off my 1841 successfully, but I now need to know the OID for interface utilization and how to define which interface to get.

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Cisco WAN :: 1841 With Virtual-Access Interface

Dec 22, 2010

I have a problem in my Cisco 1841 in Virtual-Access Interface  all interfaces is UP Except Virtual Access is Down . [code]
 
when i want recover the virtual access to up ,should i do shut & no shut to the ATM interface.What is the cause of the problem, and how I can solve this issue?

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Cisco WAN :: 1841 To Block Access To A Specific Interface

Feb 11, 2013

I have an 1841 between my firewall and the ISP.  Three interfaces - multilink to ISP, FA to my firewall, and FA to my inside network.  I use the inside interface for configs aand snmp access, etc.   Only my ISP-assigned fixed address block will get routed to the multilink by the ISP but I am nervous about the inside interface sitting on my LAN.   I know I can remove it, but if I keep it there, how can I set up an ACL so that all traffic from the multilink interface is denied to the inside interface?  I suppose another way to think about it that the inbound iface can only accept traffic from its own outside, not from the router.I think this is fairly simple but I don't want to knock down the traffic if I get it wrong.

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Cisco Switching / Routing :: 1841 - How To Use Both 2 Interface For Two Different Vlan

Jan 3, 2013

we've to configure our router 1841 to use both 2 interface Fe for two different vlan (also the second has to go on internet).

Actually we have int Fe0/0 configured with an ip address 192.168.1.1 for lan1 192.168.1.0/24 and we will use the second int Fe0/1 with another ip address like 192.168.2.1 for lan2 192.168.2.0/24.

see below configuration:

[code]...

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Cisco WAN :: 1841 ADSL Interface Dropping Connection

Jul 2, 2012

We have an ADSL2+ line from a WIC in a 1841, everything has been fine for the last few years and then the last few months the connection going down. When checking the interfaces the ATM0/0/0 is up up and the same for the dialer interface we are using, they are both up/up, but this still needs a reload of the router to be functional again, shutting the interfaces does not bring the connection back up.
 
I am not an expert on ADSL lines, I have never really had a problem with anything previously. The router was running Netflow to a network monitor wondering if this or logging was causing an issue with entries in the buffer??
 
Here is an output of show dsl int, would change the firmware, it has been fine all this time before though we are running IOS 12.4(24)T1 advseck9-m, as far as I can seen from our ISP the config for ADSL is all correct. [Code]

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Cisco WAN :: Using Connected WIC2-2MFT As Serial Interface On 1841?

Apr 29, 2012

I am trying to use the connected WIC2-2MFT, as the servial interface on my cisco 1841.But it does not show me the option, under configuration interface
 
[code] What should I do to make this enable on this list?I am attaching the show tech-support, and show version of this device.

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Cisco Switching/Routing :: 1841 No Error On Connected Switch Interface

Feb 18, 2013

We are using Cisco Router 1841 and users reporting issue related to VoIP. After investigation, seeing input errors on Router LAN interface, but there is no error on connected switch interface. [code]

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Cisco Switching/Routing :: 1841 - Connecting Routers Via Serial Interface

Oct 22, 2012

While I managed to connect to each router individually, I decided it was time to connect the routers together via serial; as I don't have any serial cables and need to buy some, what serial cables I need, as well as to ask whether I have the right cards in my router(s) that will allow me to do so.
 
I bought 3 1841 routers, and all have a 1 port serial WAN Interface Card (WIC 1-T); one router has 2 of these, and one router has a WIC-1B-S/T .. My question is, can I connect the routers with a serial cable via WIC 1-T, or do I need a 2-T

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Cisco Wireless :: 5508 Assign Single Ssid To Multiple Interface Groups By Assigning Ssid To Multiple AP Groups

Aug 26, 2012

Is it possible to assign a single ssid to multiple interface groups by assigning the ssid to multiple AP groups? 
 
I have buildings geographically dispersed that are configured with multiple vlans in interface groups so that I can maintain an addressing scheme of dhcp assigned addresses per building.  Each building is also further grouped as AP groups.  I'd like to know if by assigning the same wlan ssid to each of the AP groups, will I maintain addressing integrity for each building?  I'm thinking it will work.
 
Do the buildings have to be outside AP range of each other to avoid problems?

5508 controller
7.2.110.0  code
6 buildings
6 interface groups
1 ssid

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Cisco WAN :: 1841 / High Speed WAN Interface Card (HWIC) Supported Features?

Jun 5, 2011

my office is looking in ordering a HWIC-1FE to supply our cisco 1841 router with a second ISP connection. i wanted to find out if this card support load balancing and fail over? not sure if fail over is the right terminology so ill explain, i need it so that if one ISP connection goes down (as it does often) it fails over to the second ISP.

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Cisco Switching/Routing :: 880 (887) - Router Not Assigning IP Address

Jan 22, 2012

I'm fairly new to Cisco configuration and I am looking at a problem for a client that involves the use of a Cisco 887 (wired only) as the main router/gateway. The problem I am investigating involves the allocatoni of DHCP addresses from the device to a product we have designed that connects to the router. I am attempting to set the 880 up on the bench with no ADSL connection and just use the DHCP feature of the box for the 4 switch ports on the back. I have tried all kinds of configurations from default.  Whatever I do I can't get the router to assign an IP address to anything that is plugged in (Windows or Linux machines).  What could I be doing wrong ?  It can't be that difficult to get the system to just act as a DHCP server.

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Cisco WAN :: Assigning Secondary IP To Dialer Created On 897 Router

Sep 7, 2012

We have a dsl connection on 897 dsl router at the customers HO.The telephone line is directly connected to router we configured dialer with username and password and it takes a static ip of 212.249.213.xxx.Now he has some branches that are connected through wireless links and he has arranged for a subnet of 8 public IP's in the range 72.70.245.xxx
 
 Can we some how use these public ip's as secondary in the routers dialer interface and assign to the servers in the branches so that it can be accessed through web.

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Routers / Switches :: Assigning Static IP To D-Link Router?

Mar 6, 2011

i m using ISP provided modem+router and another D-Link Wireless router at the same time... My computer is connected to D-LInk's Router and D-Link's Router is connected to ISP's Modem...My modem's Ip address is : 192.168.1.1 Router's IP Address: 192.168.0.1ok but now problem is that now Dlink is connected to ISP's Modem and ISP's modem assigns different ip to Wl.Router. Both have DHCP enabled... But i want modem (which is also a router) to assign D-Link's router the STATIC IP... like 192.168.1.54Router Model is D-link DIR-615 Modem Model is ZTE EchoLife HG510a

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Wifi Router Not Assigning Ip Address Or Default Gateway?

Oct 25, 2012

hrome threw me a DNS lookup failed. I go into my network settings and I noticed that I had limited connectivity. It would switch between no network access and no internet access every few seconds. After a bit of fiddling around, I got it to connect through assigning myself a static IP. This isn't exactly convenient because I use this computer on multiple networks. When I try to have it on automatic IP, I get no IP address or default gateway when I do an ipconfig /all. It would appear that my router quit assigning my laptop an IP for no reason whatsoever. DHCP is enabled on the router, and all other devices work fine. What could possibly be the problem here? I'm 99% sure it's not an IP conflict either. It's not being MAC filtered because I'm on the thing right now posting this through a static IP. It's not my A/V because it's worked great in the past. Perhaps I should also mention it occasionally says "unidentified network" instead of the SSID

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Linksys Wireless Router :: WRT110 Not Assigning IPs Properly

Jul 2, 2011

The WRT110 is hooked up to Cable through Comcast and works fine with LAN connections. The problem comes in with more than one wireless laptop tries to connect. First, it was loaded with 1.0.4 firmware and my girlfriend's XP laptop would connect but drop the connection a lot. My Windows 7 laptop wouldn't connect at all. After trying everything someone recommended upgrading the firmware to 1.0.7. Well, now my Windows 7 laptop connects but the XP laptop will not. The DHCP won't assign it an IP, although it says it's connected.

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Cisco :: Why Can't (next-hop-sefl) Take Effect

Apr 21, 2012

RT1 is RR client of RT2, we run label BGP among RT1, RT2 and RT3; MPLS LDP is OK; RT1 network route 192.168.1.18/32 with MPLS-label 4123, we hope RT2 propagate it to RT3 by its address 192.168.8.2 and swap MPLS-label, however, RT2 just propagate it without any changing(192.168.1.18/32 nexthop 192.168.8.1).

router bgp 65000
bgp router-id 192.168.8.2
address-family ipv4 unicast

[code]...

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E4200v2 Router Assigning Arbitrary Ip Addresses To Wired Peripherals?

Feb 13, 2012

problem I have encountered with a Cisco E4200v2 router (with current firmware update) which is just over three months old. The other day my internet connection (cable "always on") hiccuped a couple of time (which is not unusual for this area). However, when the service finally restored itself, I lost a PC and printer from my home network, and the ability to connect to the internet with the wired PC. Outages like this are normal in this area and have not had an issue like this before. Both were "wired" via (CAT 5e) cables. The three PC's that were connected via wi-fi were not affected. We switched CAT 5e cables several times with not changed in status. The wired printer and PC were assigned arbitrary ip addresses in the 16X.XXX etc. range. I think that has to do with not being able to communicate with the DHCP server? However, we connected one of the laptops via a CAT 5e cable directly to the router, and it too was assigned an arbitrary ip address. I finally reverted to my old router (LINKSYS WRT160N), and the issue went away. Is this a known E4200v2 issue? Is there a fix or workaround for this? The "wired" PC and two laptops are Windows 7, and the all-in-one is running Vista.I can continue using my WRT16N. But hate to think I wasted good money on this new dual band. Have never had any issues before with Linksy/Cisco before.

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Linksys Wireless Router :: WAP 610n Not Assigning DHCP IP Address?

May 20, 2012

The problem is WAP 610n not assigning IP address through DHCP; i have to add IP address mannualy.
 
just go through the details below:
In my network environment we are using :
CISCO Router 800 series; IP: 192.168.1.1
Domain server with DHCP server : 192.168.1.2
DHCP pool: 192.168.1.234 - 192.168.1.250
WAP IP : 192.168.1.236
 
WAP configuration :
configuration view : mannual
Wireless band : 2.4 Ghz
Network mode : mixed
channel width: 20 Mhz only
standard channel : auto
SSID broadcast : Disabled [ for security reason]
Security mode : WPA2 Personal
Encryption : TKIP/AES
Firmware : 1.0.01 build 94, Oct 26, 2009
Note: In status menu it is not showing any default gateway.
 
Encapsulation method in CISCO router : PPPoA [ as instructed by ISP]

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