The operating system used on the majority of Cisco's routers and switches; a package of routing, switching, internetworking and telecommunications functions tightly integrated with a multitasking operating system. For Apple's mobile device OS, use apple-ios.

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1answer
60 views

3750s not logging mac address changes?

I have enabled mac address change logging on my Cisco 3750s but I'm not getting any results. What am I missing? I've moved hardware a couple times and set up a couple new VMs with totally new MAC ...
1
vote
1answer
1k views

How to setup a static multicast ARP entry with Cisco SG300?

We're running a Microsoft NLB cluster in multicast mode as a loadbalancer. Using our old Cisco IOS switches we propagate access to the cluster to our branches using a static ARP entry in the core ...
0
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0answers
20 views

How to fix stalled connection on large download

I have a cisco 1921 router performing routing and NAT function. Cisco 3750 is performing layer 3 core switching duties. Users are complaining about large file transfers being stalled (not dropped) ...
0
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0answers
17 views

Unable to communicate with web proxy server on iOS

I am following the instructions on how to use a HTTP proxy with an iPhone, however I appear unable to communicate with the HTTP proxy. I have configured the settings in my phone correctly to use the ...
0
votes
1answer
41 views

Putty: disable configuration of server terminal length

I would like to prevent Putty from setting the server terminal length so as to avoid the dreaded --More-- prompt in Cisco IOS. Please do not tell me to set length 0 in line config mode because this ...
0
votes
3answers
719 views

Cisco 881 throughput/bandwidth issue

We have a dedicated 30Mb connection (up/down) from our ISP, but we can only seem to get 10Mb (up/down) from the router. Does anyone know what we're missing, or how we can tweak the settings on this ...
1
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0answers
110 views

Trying to change a custom VPN port back to the original on Fortigate 40C

We recently changed our firewall and bought a Fortigate 40C device. We wanted to use our old VPN settings. The Fortigate support technician told us that this model was new and he didn't know it in ...
3
votes
2answers
351 views

Delay NTP Initialisation, Cisco 877W, IOS 12.4(24)T1

I have a Cisco 877W which I'm using for my home ADSL connection (and as a refresher in Cisco IOS). I've got a working config in-place with my PPPoA connection coming online correctly, and VLANs and ...
0
votes
0answers
21 views

C3600 Vlan's convert from IOS V 12.4 to 15.2

I need some help to get vlan's to get working again. I have a c2500 with v12.4 that works with the config above, now with a new c3600 with the same config but with v15.2 I can't put vlan's working. ...
0
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0answers
37 views

SSL Client Certificates on Mobile

Has anyone gotten mobile devices to use client SSL certs with nginx? I have configured a private Certificate Authority and I'm using an intermediate cert to sign client certificates. Clients ...
0
votes
1answer
797 views

Cisco - Port's configured trust state is now operational

I am looking at a Cisco switch's log at work and am a bit confused by how verbose it can be at times. For instance, we use automatic QoS here and I often see this when phones are plugged: Mar 18 ...
0
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1answer
23 views

Cisco IOS Show | Filter | redirect

I am new to Cisco IOS and I have one question that I have come across. Please reference this thread. Reference The answer to that thread states that in Cisco IOS you can run a command, filter it down ...
2
votes
1answer
66 views

Cisco 7604 router runs out of memory when loading the IOS image, yet runs a different image with similar reqs

I am experiencing an unusual memory issue with a Cisco 7604 router, specifically the memory on the Supervisor Engine (SUP32-GE-3B) and how it pertains to IOS requirements. I was preparing the router ...
2
votes
1answer
109 views

Packet loss on between firewall and uplink?

I have a moderately complex network topology between my external firewall and the internet, as shown below. Every so often - I haven't found a pattern yet - we're getting a significant degree of ...
0
votes
1answer
46 views

Version of IOS for Cisco 2900 series? [closed]

Can someone please provide the current version of IOS for the Cisco 2900 series router? I'm having trouble figuring this out based on Cisco's documentation. Thanks.
1
vote
2answers
42 views

Cisco IOS - Stuck in Read Only Mode

I can't figure out what happened but I can not enable privileged mode in my Cisco 3750. At first, I tried: enable to enter EXEC mode. My password would not work and it kicked me out after 3 ...
4
votes
1answer
78 views

Does Cisco IOS support the use of variables in its configuration?

I'm configuring a Cisco IOS (version 15) router, and I need to use the same values in multiple places; in this case, I need to configure the router's name servers (ip name-server <address>) and ...
0
votes
1answer
81 views

Port Forwarding on Cisco Router

I'm a Cisco newbie, have the 1841, with two ethernet interfaces: interface FastEthernet0/0: Internal Desired destination IP: 186.67.181.140 interface FastEthernet0/1: External World IP ...
2
votes
0answers
182 views

strongSwan 4.5.2 with iOS and Mavericks, Connection Troubles

I am having trouble configuring strongSwan 4.5.2 to work with iOS 7 and OS X Mavericks. I have followed these two guides, but am still encountering problems. ...
0
votes
1answer
137 views

Cisco 887VA Port Forwarding Not Working

I have a Cisco 887VA connected to our BT Business Broadband line. We also have another modem on a seperate connection which also handles our DHCP. The Cisco is plugged into our network switch, as is ...
0
votes
2answers
910 views

strongSwan without password on iOS [closed]

I have the following problem: I need to authenticate on VPN with iOS without password, but with certificate only. The reason is I need "VPN on demand", which is active on certificate authentication ...
0
votes
0answers
202 views

Unable to ping from/to Cisco IOS XE (CSR 1000v)

I have a lab that requires connecting an IOL router and a CSR 1000v (IOS XE). Both are set on Vmware workstation 10 - Win 8 within a proper VMnet. The other routers (IOL and XR) can ping each other ...
0
votes
1answer
136 views

iPhone can't authenticate at dovecot

I've set up a mail server running with postfix and dovecot. Mainly configured as described here. Also I created a signed certificate from Startssl.com. IMAP is running on port 993. From my computer ...
0
votes
2answers
1k views

Cisco AP Recovery mode - TFTP issue

I am booting without IOS and I get this prompt: ap: then I issue these commands: ap: set IP_ADDR 192.168.0.111 ap: set NETMASK 255.255.0.0 ap: set DEFAULT_ROUTER 192.168.0.1 ap: tftp_init ap: ...
3
votes
2answers
184 views

Split multicast traffic on two vlans using IOS

Here is what I want to do: On a switch / router running cisco IOS ( Ideally it would work on a Lanbase image on a 3560G but it is possible to use 65xx routers also ) I receive two udp multicast ...
1
vote
1answer
100 views

Name resolution failing on Cisco 800 Series

Our ISP is currently in the middle of a major DNS outage and as a result name resolution through the nameservers they provide is not working. I'm trying to add Google DNS servers to our Cisco 800 ...
0
votes
0answers
25 views

Is it possible to hairpin on Cisco 851W IOS 12.4(15)T9 and how?

I need machines on the LAN to be able to access by the external address or hostname. If it can't be done, then just by hostname is OK as well, so I thought of just doing it through DNS on our internal ...
0
votes
0answers
99 views

Cisco 861 - Unable to traceroute

I'm having an issue with my Cisco 861. I'm unable to traceroute to any ip address from the router, even the next hop. Can anyone suggest possible causes. Apologies for the censoring but I won't take ...
0
votes
1answer
95 views

MDM Server Apple Certificate: Certificate Signature Verification failed

I want to create a MDM server to manage my iOS devices. I have enrolled in iOS Enterprise Developer program. And executed the following openSSL commands "1. Creating Certificate Authority (CA)" ...
0
votes
0answers
62 views

Courier IMAP namespace prefix not used by default on iOS

On OSX Mail.app, connecting to my Courier IMAP server, everything is working fine. I can read mails, delete stuff, move it to trash. However, when using the same server on iOS, I get error messages, ...
0
votes
1answer
85 views

Cisco IOS: Prevent Inter-VLAN IPv6 Network Solicitation messages

I have a Cisco 3825 router that (among other things) functions as a gateway to the internet. I have two VLANS, but only one of them should have access to the internet. VLAN10: network = ...
2
votes
2answers
827 views

Configuring a loopback interface on a Cisco router

I have Router 1 with the following interfaces: FA0/1: 192.168.9.193 255.255.255.224 S0/0/0: 192.168.9.129 255.255.255.224 S0/0/1: 192.168.9.161 255.255.255.224 This is for my assignment at ...
0
votes
1answer
64 views

APP installation - iPhone [closed]

I am trying to automate the installing procedure of iPhone apps (i.e) installing apps for around 5000 phones. For this I am planning to deploy an MDM server in Windows Server 2008 containing Active ...
2
votes
2answers
1k views

Basic IPv6 firewall on Cisco IOS for small network

Now that I have IPv6 connectivity to my network, I'm looking for a basic IPv6 firewall configuration for IOS. It used to be that we could rely on NAT to 'hide' internal (read: outgoing connections ...
0
votes
0answers
36 views

Cisco IOS log packets dropped due to no NAT entries?

I use access list logging currently, and update the access list to match the NAT table, and then the access-list deny any any log command is used for logging packets that were not allowed. However, I ...
0
votes
0answers
74 views

Site-to-Site VPN not connecting with Cisco 877

I can't seem to get the VPN connection going with my 877. I have an old IOS (12.4) but it looks to me like all the pieces are there. I have compared this config against the Azure-provided (albeit ...
1
vote
1answer
256 views

Certificate 'not verified' when doing 802.x1 authentication on Apple ios

I've setup a new wifi network including a Freeradius server. Everything works fine except that Apple iOS gives a 'certificate not verified' warning when connecting. When the user accept the ...
8
votes
4answers
172 views

Prevent end-users from purchasing apps on iOS

We are looking to deploy iPads from inside our organization. We want to be able to install apps for users, which can be done via Mobile Device Management. However, we do not want users to be able to ...
10
votes
2answers
258 views

How to safely install a new IOS image on a Cisco device when the installed flash memory size isn't enough for two of them?

Today I was updating IOS on a Cisco 877 router, and a problem came up: the installed flash memory wasn't enough to hold both the old and the new IOS images, so the new one couldn't be uploaded unless ...
0
votes
0answers
103 views

Cisco 1841 - Acting as a PPPoE terminator?

We have 2x Fortigate 200B firewalls that we wish to operate in Active/Active HA mode - though, obviously, they cannot do this with PPPoE/DHCP enabled on the externally facing interfaces. To overcome ...
1
vote
1answer
46 views

What network/device info can be obtained from an iOS device connected to an 802.11u-enabled access point?

In order to perform some device security validations, I need canonical references to what device/hardware/network information can be obtained from an iOS device connected to an 802.11u-enabled access ...
2
votes
2answers
68 views

Show code for specific block in cisco IOS conf mode?

I work with Fortigate gear a lot and in the CLI it's possible to navigate to a node (say config system global then type in show and it will show me the configuration from that block. In IOS I can't ...
0
votes
1answer
58 views

Cisco switch restart doesn't reload config

Something really strange happened to me today. I was configuring a 3750 switch and halfway through the changes I messed up. So I did what I've always done, unplug the power cable from the switch and ...
1
vote
1answer
52 views

How can we better pinpoint instability issues on our network?

We have a medium-sized network of 600 users, all on Cisco switches. Where the users are allowed to plug in routers, etc. on the endpoints, so that they can use wireless and/or multiple devices in ...
0
votes
0answers
94 views

Cisco 1602: rewriting startup-config from terminal

How do I rewrite startup-config on a Cisco 1602 router without affecting the running-config? Outgoing connections from the router (scp, http) are not allowed. I'm not connected to the serial port, ...
0
votes
1answer
90 views

Cisco IOS, restrict IP addresses per ethernet port #

I am configuring a Cisco 881, and am interested in restricting individual ports on the LAN (FastEthernet 0-3). I would like to be able to limit the IP addresses that someone can use based on which ...
7
votes
2answers
806 views

Can the iPad remember the iTunes password when using Meraki MDM?

I'm currently using Cisco Meraki MDM to manage apps that get pushed out to company-owned iPads. In order for the company to retain ownership of the apps we purchase, apps are installed through the ...
0
votes
1answer
990 views

GNS3 - Emulating a not supported Cisco router (model 881w)

I want to create a new configuration for a Cisco 881w from scratch. So I want to replicate my environment on GNS3. But I cannot emulate a Cisco 881w (which is the router i have) into it. So I am ...
0
votes
0answers
45 views

CISCO IOS Forward (nat) specific IP to other IP and Port

I've a customer that has a CISCO 7604 as a Border Router.. (Within Network uses Mikrotik, Freeradius, Meraki, etc)... I'm trying (newbie with Cisco) to create a Forward Rule (in Mikrotik is a Nat ...
1
vote
0answers
557 views

Cannot access L2L VPN from RA VPN connected client on Cisco ASA 5510

We have a Cisco 1921 router running IOS 15.1 at one of our branches which is connected via a L2L IPsec VPN to a ASA5510 running ASA 7.2 at our headquarters. The ASA also provides IPSec Remote Access ...