Cisco Infrastructure :: Blackout During Configuration Reset 1700 / 1721 Router
Apr 7, 2011
i got a big problem, during a configuration reset i got an electrical blackout. I have set the configuration back after a password reset and send the reset prompt. At the restart of the router the blackout take all for 10 seconds out. When i restart the system an connect the router with the hyper terminal i get the following output:
[Code].....
I think the config was lost but how can i restart the router and enter a new one?
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Oct 9, 2012
I am having a problem configuring a VPN connection from a 1721 router to an ASA5520. The router has already been configured, but I have been asked to setup the VPN.I think the issue is because they are using a Loop back interface (which I have never configured for before).
The "sh crypto isakmp sa" command shows:
dst src state conn-id status
5.6.7.8 1.2.3.4 QM_IDLE 4 ACTIVE
where 5.6.7.8 is the ip on Loopback0, 1.2.3.4 is remote peer ip. Pings to the remote network don't work.
Here is the (slightly edited) config of the 1721 :
Current configuration : 3838 bytes!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
[code]......
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Sep 19, 2012
My company just assumed management of a remote entity. The network has several misconfigurations and I need to make some network modifications from my office w/o losing access or incurring lengthy outage to the clients. The network consists of 1721 router and three 2960 switches.
- I only have access to the router from the Internet. I telnet off the router to the 3 switches.
The site uses a single class C 192.168.1.0 / 24. The router is running RIPv2 even though this is the only network. The prior network person (contractor) set up separate native vlans on each switch and all the ports are defined as Native trunk and access are defined to the VLAN interface assigned to the switch. So of course the logs are flooded with Native VLAN mismatch, Each 2960 switch is a VTP server but has no VTP domain.
basic network layout:
Internet => Eth [Cisco 1721] => Fa 0 192.168.1.254 ==> [SW1]
[SW1]
interface Vlan1
no ip address
no ip route-cache!interface Vlan220ip address 192.168.1.219 255.255.255.0no ip route-cache
[code]....
!interface GigabitEthernet0/1description SW2 Gi0/1switchport access vlan 204switchport trunk native vlan 204!interface GigabitEthernet0/2switchport access vlan 204switchport trunk native vlan 204!interface Vlan1no ip addressno ip route-cache!interface Vlan204ip address 192.168.1.224 255.255.255.0no ip route-cache Normally, I would assign the current 192.168.1.254 to a subinterface to Router Fe 0/0 but with each switch having its own native VLAN I am afraid I will lose connectivity to the downstream switches -- my only access is telnet off the Cisco1721 Router.
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May 29, 2012
I can't figure this out and there isn't much documentation on the subject online. The reset button just resets the device even after holding it for 10+ seconds and there is nothing in the CLI.
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Apr 18, 2010
Having trouble resetting the baud rate to 9600 on a 3750-E. Basically the device cannot be set to anything other than 115200 baud rate. I have changed this via startup-config (which lost connection) reconnected and saved config but after reload was back to 115200. Tried via bootloader to 'set 9600' but the termial program paused for a bit then the switch prompt returned. Tried the same to 'unset baud' but the same thing as above happened. I have erased and reloaded flash etc
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Feb 3, 2013
I need to recover the passwords for my 3750 stack (2 switches), I have the password recovery documentation but it seems to be referring to recovery for one switch. How do I go about recovery when in a stack, should I remove the links on the switches and recover each one separately?Alternatively can I do a factory reset on them
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Apr 4, 2011
How do you reset a 1252ag access point that has the mode button disabled?
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Feb 28, 2012
We currently have 1 T1 coming into a 1700 series router for our internet traffic. We are looking to add 2 more T1's to this and was curious what would be a recomended router for this. Our provider is trying to sell us an adtran for $4200 which can handle 4 T1's.
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Apr 3, 2011
We are facing strange issue in our network. We have a remote branch which is connected to main branch using Leased Line. Remote branch is having Cisco 1700 Router. Every day in the morning time the remote router is unreachable. We are not able to reach (ping/telnet) the remote Router but able to reach L3 switch/ LAN behind this router. The users from remote branch is also not able to reach the local router but they are able to ping the Main branch.Users in the remote branch are not able to access any resources in the main branch during the issue.
During the issue, we have checked the remote branch router and found the CPU utilization of the Cisco 1700 router is very high (99%). If we run "Show process CPU" command (please find the attachment) specially IP input process is very high (97%).
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Feb 11, 2011
I have a Cisco 1700 series router (i dont know exact series number) running:
ROM: System Bootstrap, Version 12.2(7r)XM4, RELEASE SOFTWARE (fc1)
ROM: Cisco IOS Software, C1700 Software (C1700-K9O3SY7-M), Version 12.3(7)XR3, RELEASE SOFTWARE (fc2)
installed is a WIC-4ESW card.
This should be simple, cant get it working. in a nutshell... I'm trying to configure fa0 as a vlan "trunk" port trunking vlans 1 and 20 from my managed switch (switch is configured correctly) and i want fa1 on vlan 1 and fa2 on vlan 20.
another words:
fa0 tagged with vlan 1 & 20
fa1 untagged with vlan 1
fa2 untagged with vlan 20
Code:
! Last configuration change at 20:35:48 EST Sat Feb 12 2011
! NVRAM config last updated at 20:47:38 EST Sat Feb 12 2011
version 12.3
[Code] .....
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Aug 25, 2012
I'm trying to configure 1700 K9 router to act as PPTP client and connect to Microsoft VPN server (in order to enable all clients on LAN to seamlessly access host on remote location). [URL]
I'm using GMS3 to test everything in lab environment. I managed to connect to Microsoft VPN server but the connection drops immediately. Below is debug info from router R1 (router R2 just simulates host on LAN) and configurations for both routers. The only clue I got from debug is that immediately before closing connection there's a message "CCP: Failed to negotiate with peer"...
R1#sh debug
PPP:
PPP detailed event debugging is on
MPPE Packet Details debugging is on
[Code].....
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Jan 23, 2012
We currently have a main network running through a static broadband connecting using a Cisco 1700 ADSL router, everything is working fine locally.
We are looking to rent some space in an office nearby so im going to order another business adsl connection with static IP for this site and i currently have a spare 1800 router.My question is can the cisco routers connect up like a VPN connection so both sites work together and will the connection remain online constantly so from the remote office we can access all our servers from the main network?
Also how does the IP addressing work on 2 sites. The main network uses 10.120.21.x and DHCP is assigned from a cisco router. Does the remote network assign from the same DHCP server or would the remote sites cisco router need to be setup to give out DHCP to local machines. If so what would be the best IP setup to use.
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Jun 16, 2012
I am trying to setup WCCP on our 4507. For some reason I cannot get this to work! The config I have tried is below. I can't figure out
ip wccp web-cache group-list IRONPORT-GROUPLIST
ip wccp source-interface GigabitEthernet2/24
!
Interface Vlan160
[Code].....
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Dec 15, 2003
Is there any tool or script which will automatically generate scripts for routers, switches. I am configuring 100's of cisco 3700 routers and 3500 switches. I want to be consistent with my configuration . I am looking for script that when u run it, it will prompt you step by step to configure router, and switch and generate router config file. I know aobut cisco autoconfig maker but thats not what i am looking for.
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Nov 30, 2011
i trying to set up a terminal server, 2811 with an HWIC-16A und two octo cables. [code] connect and sometimes not. It seems the connection is established but i don't get a prompt von the target device.The target devices are cisco 2811 and cisco catalysts 3560.
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Nov 19, 2012
configuring VPN in my cisco 1721 router to connect in vpn client
I have the public IPs.
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Sep 29, 2002
I X modem an IOS file to my 2620 router and in the process set the console bps to 115200 which changed the register to 0x3922. Now when I try to connect from the console with any bps, I get garbage!
I can connect from the AUX port and get to the User Exec. mode but since no privileged password is set, I can't get any further to change the config register back to 0x2102.
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Jul 25, 2012
we just replace 6500 with N7K, after migration there're some device (server,pc,printer) change its ip address configuration (subnet and gateway) by it self. can N7K did it?
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Feb 24, 2012
How to set upo configuration & Security after reset
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Apr 24, 2012
I am going to configure ospf on cisco 1721 router but when I give command
conf t
router ospf 116
it does not show (config-router)
I am attaching sh run and sh version herewith attachment
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May 8, 2012
I have a 1721 router with 3 equal routes to 0.0.0.0, using CEF for load balancing with universal load balancing algorithm. It doesn`t NAT, just routing. I wonder which is the maximum capacity of the router, since it should support up to 40000 connections to different destination IP. Is the limit set by the router resources (CPU, memory, ...) or a maximum limit of entries in the table FIB / RIB?
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Nov 24, 2011
IGMP Snooping configuration for Multicasting on Cisco Catalyst 3020
Our switch model is "Cisco Catalyst Blade Switch 3020 for HP" We are building HA (High Availability) Databases infrastructure. Currently, there are two nodes(hosts- servers) and two above switch for HA.
Oracle said we need to turn off the IGMP Snooping in order to use the multicasting for their interconnect communication. So my question is:
Q1> Is there any way to use Multicasting without turning off IGMP Snooping on Switch side?
Q2> If 'yes', how can we configure the switch for Multicasting ?
Oracle uses 230.0.1.0 & 224.0.0.251 IPs with 42000 range port for Multicasting communication.
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Mar 3, 2011
Trying to work out if I can setup a VLAN interface on a 1721 router.The only interfaces that are listed are the Ethernet (W1-ENET) and the Fast Ethernet interface.I'm still super new to all of this and learn how to change IOS via rommon and TFTP after realizing I had an IOS too large for the memory?
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Apr 20, 2011
Monday, I had a cisco 1750 router in place suddenly stop communicating to a Larscom ISP owned unit. Since then I have sent two replacement 1721 routers with WIC-1ENET cards. I have used the original straight thru cable to connect the 10baset port on the Larscom to my E0 on the WIC-1ENET. No link lights on either. I have also tried a known working straight thru cable and a crossover cable. No link lights.
I can take a crossover cable from a pc and ping the E0 port without issue. The ISP is telling me it is an issue with my equipment.
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Jan 10, 2012
I am in the process of configuring two vpn tunnels on one interface of cisco router series 1721. Any link or document with more information?
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Jul 13, 2011
I have the Cisco series “Cisco 1700” routers operational at my client site, These router suddenly get reboot with 1 or 2 hrs gap. See the below errors which has been captured in router logs:
============================================================
00:00:09: %SYS-5-CONFIG_I: Configured from memory by console
00:00:11: %SYS-5-RESTART: System restarted --
Cisco Internetwork Operating System Software
IOS (tm) C1700 Software (C1700-Y-M), Version 12.2(16.1)T, MAINTENANCE INTERIM S
OFTWARE
TAC Support: [URL]
[code]....
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Aug 22, 2011
I managed to setup a 1721 router as a vpn server connecting to it using a cisco vpn client however altough I am obtaining an ip address as defined in the dhcp pool I am unable to communicate with both the remote network and also I have no internet as soon as I connect.
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Mar 27, 2011
Is it possible to set up a vpn tunnel on a 1721 router that uses the following ios:
c1700-y7-mz.124-13b.bin
I thought I had read somewhere that tunnels were not supported on the 1700s but wanted to make sure. If they are I would like to know if they are supported in the above ios.
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Feb 25, 2011
I have cisco 1721 router so I installed an ethernet interface card so when I make show run I found that there is a fast ethernet 0 and ethernet 0 (which I installed) so i wand to make subinfaces of the etheernet 0 but I can't. I tried to make encapsulation dot.1q but it doesn't accept it.
Is Ethernet0 supported to generate subinterfaces?
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Jul 14, 2011
is there a way to reset/clear a particular context's configuration?
I see there is a 'wri erase' within a context, but no reload/reset - neither from the context itself nor from the Admin... puzzling...
I dont want to reload an entire blade just to clear one of the context's configs.
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Jan 17, 2011
I have not done much with business routers, but we have a 1700 series with a WAN WIC-1ENET card with a RJ45 connection. We had a T1 line and will be moving to ehternet. We are going to be moving to a 20MB line, and i just wanted to make sure I have the right connections before installing. We also have a T1 line in another loaton and would be moving to this same 2811 router there as well.We would also like to copy over the configuration from 1700 series router to the 2811 router. Would it be easier to do it by hyper-terminal? Also if we keep the 1700 routers are they capable of using layer-3?
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Feb 26, 2012
I was looking for a way to connect an AUX port from a 1700 router to a 6500 switch module console port, to see the output of the Switch's on the 1700 router, in case there is a network downtime, I could see what's going on in the switch, what cable should I use ? Also, is there is any kind of documentation for this type of config what have I seen is very few info.
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Oct 20, 2011
Long time since I have had to configure a router and have a small project
Here is what I have in a simple diagram:
PC(static IP)--to--Switch--to--(Ethernet0 int, WIC0)1721 router(FastEthernet0 int, built-in)--to--Switch--to--PC(DHCP)
I need static IP PC to be able to ping the DHCP client. Static IP units 10.1.1.x/16, DHCP clients 10.1.3.x/16.
I have found these overlap and thus give errors and will even shutdown the interface if I enable certain things like routing or bridging.
So I gather I need to change one interface IP range, which would be the DHCP side, I need to stay 10.1.1.x/16 for static side.
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