Cisco is a major provider of switches and routers to most medium and large companies. Cisco devices often run IOS or NX-OS. This is a generic tag to be used when no more specific tags are available. See the partial list of tags in the full Tag Wiki.

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Cisco router: expired translations not timing out

Why would a Cisco router stop removing expired translations from the NAT table? For example: #show ip nat translations tcp verbose tcp <loopback>:60576 <inside>:60576 ...
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26 views

SPAN port only shows multicast traffic on Cisco switch

I'm trying to set up a cheap network forensics solution; I have a Cisco Catalyst as my main switch connected to my router. I have mirrored the port that is running to the ASR to a different port which ...
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2answers
43 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 ...
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2answers
99 views

How to push configurations to multiple Cisco Switches

Assume I have around 50 Cisco IE2000 Switches connected together and I want to reconfigure some settings, the same settings for every switch. Normally I would open a command line session via Putty ...
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3answers
384 views

Native VLAN mismatch and missing VLAN?

I'm trying to wrap my head around what exactly is going on here with a new site's configuration of their networking stack. This particular piece I am working is pretty simple but I having a hard time ...
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1answer
163 views

How to statically configure DNS servers on a Cisco router when the WAN interface uses DHCP?

I have a Cisco router (model 887VA, IOS 15.4) used to connect a LAN to the Internet via ADSL. The WAN interface uses DHCP: interface ATM0.1 point-to-point ip address dhcp I need the router to use ...
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0answers
18 views

Several hcAlarmVariable fields in hcFallingAlarm and hcRisingAlarm snmp notifications

I'm a little bit confused about several hcAlarmVariable fields in hcFallingAlarm/hcRisingAlarm snmp notifications from Cisco devices. Actually, I have to send notification when receive such kind of ...
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0answers
51 views

FreeRadius and Cisco 2600 Terminal Server [IOS 12.1(3)T]

I'm using FreeRadius 2 and Cisco 2600 Terminal server to coordinate access to cisco routers based on time‏ ranges. Basically we are an education/training environment where we have some students ...
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0answers
42 views

Does Cisco IOS XRv support logging of TCP connection (e.g. built and/or teardown)?

I have a demo of Cisco IOS XRv and I would like to setup logging for connections. E.g. for ASA "show logging" shows log messages for every TCP connection built or teardown: Jun 11 12:29:31 ...
2
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1answer
112 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 ...
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1answer
139 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 ...
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0answers
38 views

Cisco VoIP telephony - Can't save Night Service Bell Configuration

When trying to save "Night Service Bell Configuration" settings under Cisco Unified Communications Manager Express the following error message pops up. Configuration change failed. Please report the ...
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5answers
1k views

Are Cisco admins expected to understand classful networks?

While studying for the CCENT exam, my reference materials have made an alarming number of references to class A/B/C networks. Thankfully they just treat Class A/B/C as shorthand for /8, /16, and /24 ...
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1answer
203 views

Cisco ASA 5505 No LAN access through VPN

I have been fighting with this ASA 5505 for a days now. I am verly new to networking and need support by the community! I have completely configured the CISCO 5505 allowing me to browse the internet ...
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0answers
52 views

How can I add ACL entry comments on a Cisco 3750?

I'm trying to find the best way to add comments into my access-lists. For the moment, the only maneer I found is the following one: switch#conf t switch(config)#ip access-list extended VLAN-TEST3 ...
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1answer
160 views

Enabling Jumbo Frame on Cisco 2960G

I'm having issue with enabling jumbo frame on my Cisco 2960G. Here is what I tried, and what I got: Switch(config)#system mtu jumbo 9000 vb:: Read-only file system Changes to the system jumbo MTU ...
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1answer
101 views

Create two users with access to privilege level 15 on Cisco IOS

I have a Cisco router running IOS 12.4. What's the simplest way to: have two users (e.g. user1 and user2), each with his own password both of which can log in via telnet remotely both of which have ...
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1answer
62 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 ...
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0answers
40 views

Is there an optimal NAT configuration in Cisco IOS for peer to peer applications?

The Cisco router in my organisation is set up to use Port Address Translation (PAT) for Internet connectivity. ie All outbound internet connections are from the ip address or the border Cisco ...
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0answers
41 views

How do I make Cisco phones use <user>@<domain> instead of <user>@<ip> in SIP messages

I am using Cisco 8000 and 9000 series IP phones and registering them to Opensips. The problem is that I want to communicate with the proxy using @ instead of @ so I can have multiple domains on one ...
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1answer
56 views

Trouble with EMC vNXE and Cisco Catalyst Configuration for vSphere 5.5

Good afternoon, we have recently purchased -two Cisco Catalyst 2960-x switches -two Dell PowerEdge 320R server -1 EMC vNXE 3300-1 storage device I'm having a difficult time configuring the ...
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2answers
92 views

Cisco switch VLANing based on MAC address

Is it possible (or advisable) to tell a Cisco switch to VLAN based on MAC address? If so, how? I know it can be done on a port-by-port basis, but I'd like more granularity than that. We're using ...
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1answer
42 views

Reading .pcap files by CISCO ASA5515-X

I have .pcap file that already includes thousands of packets. I want to analyze these packets via CISCO ASA5515-X to observe how much of them are possible to be an attack packet (malicious). However, ...
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1answer
49 views

Fixed ip to specific lan port

How should I go forth to set a fixed/static ip dedicated to one lan port in my switch or router, so that everything i plug in that specific port acquires the same ip? I have a Linksys EA6700 Wireless ...
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1answer
94 views

Cisco ISE 1.2.5 - Exporting Custom Reports

Having some troubles exporting reports from ISE when they have a custom time period. Trying to export the past 5 months, but even a custom period of the last 4 days for example will not export. I can ...
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0answers
207 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 ...
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4answers
783 views

How can I make an internet facing TFTP server secure?

I have many Cisco IP phones that operate in the following manner (oversimplified): Negotiate with DHCP for IP, DNS, TFTP, etc. Look for SEPXXXXXXXXXXXX.cnf.xml configuration file on TFTP server ...
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1answer
198 views

WCCP and Squid, and Tunnels

I'm trying to configure WCCP + Squid with the following documentation: http://www.crypt.gen.nz/papers/cisco_squid_wccp.html I have a cisco switch, a test client, and a squid proxy server. I think ...
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0answers
26 views

Sending traps for FIB changes

I'm trying to enable sending traps for FIB changes, and I've been working on this for weeks. I finally found these commands, but my Cisco 2600 does not accept the "cef" command. Can anyone help me ...
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0answers
18 views

vpnc not work on linux backup machine

I have a very strange problem with the VPNC ( vpnc cisco client , open source vpn for cisco ) I installed the VPNC on my linux machine linux_box1 ( red-hat version 6.3 ) this machine is VM ware ...
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0answers
40 views

Port mirroring on CISCO 2960S

I am trying to do a port mirroring of the traffic for my core switch to a port on my managed switch. The environment that i have is a stacked switch, with 1 serving as the core switch and 2 serving ...
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43 views

Cisco VPNC + get time out on target machine

I am running VPNC on linux red-hat machine ( version 6.3 ) , And my VPN connection seems to be timing out after 10-20 min . If it goes unused for more than a few minutes, I have to kill VPNC and ...
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0answers
118 views

VPNC cisco + quick mode response rejected error

I installed a vpnc on my Linux red-hat machine version 6.3 Most of the cases vpnc work well ( connecting to gateway customers by vpnc ) But against some particular customers ( Cisco gateways ) , ...
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0answers
57 views

cisco VPNC - why vpnc not block the LAN interface?

Subject : VPNC allow local LAN access in spite we activate the vpnc on my Linux red-hat machine As all know when we want to activate the cisco vpn on win machine , once vpn is active then the LAN ...
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0answers
46 views

Cisco 881W Zone Base Firewall

I cannot ping an Internal system to a DMZ system. I have checked the policy map session and everything time I do a ping the match shows the first ping was matched but none of the other pings were ...
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1answer
38 views

How to view traffic operating on a specific port without plugging into egress interface? (Cisco IOS)

I'm trying to track down what host is infected with ZeroAccess on my network. It runs on ports 16464-16471. I would like to find this host without having to connect my laptop to the egress (WAN) ...
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1answer
77 views

Is running our workstation network through VoIP handset best practice? [closed]

We are purchasing a Cisco UC VoIP phone system and the handsets come in two flavors: 100mb and 1gb. Both allow network pass-through of another device such as a printer or workstation. Is this an ...
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0answers
16 views

How can I get QoS over a WDS bridge on Cisco WAP551

I have two Cisco WAP551 devices bridging two physical locations wirelessly across the street from each other (200 feet, line-of-sight through a window). This is replacing a much, much older wireless ...
0
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1answer
82 views

CISCO: conditional port-based NAT (policy-based PAT)?

I have a problem to nat-translate inbound http packets to different local_ips based on some condition (like dscp bits set). Actually the dscp bits get set on the incoming trafic using NBAR. I hope ...
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0answers
40 views

is there any cisco-compatible ipsec+comp module?

I am looking for a waqy to establish an Ipsec tunnel(with lzs-compression enabled) between a cisco router and a host(using strongswan or sth else). I can establish a tunnel without lzs-compression. ...
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0answers
150 views

Will the Linux Open VPNC Client connect to checkpoint or nortel VPN gateways?

Site: http://www.oucs.ox.ac.uk/network/vpn/linux-solaris/index.xml?ID=VPNC What is open VPNC: VPNC is an open-source VPN client for Linux and other Unix systems which is compatible with the OUCS VPN ...
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0answers
38 views

CISCO VPN CLIENT + on linux machines

I have try to install the VPNC Cisco client on many linux red-hat version For example Linux 5.2 ( red-hat ) Linux 6.2 ( red-hat ) Linux 6.3 ( red-hat ) And on different kind of kernel versions ...
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1answer
52 views

netscreen sn25 vs cisco asa5505 speed

Current i have 2 server direct connect to 1 juniper netscreen sn25 firewall then go to internet, the intel 350 nic is setup at 100mbps (which should be able go up to 1000mbps). the problem is this ...
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0answers
32 views

install cisco VPN client on linux in place on WIN XP [duplicate]

I have win XP with VPN client version - Cisco 5.0.01.0600 Now we want to replace the WIN XP with linux machine , red-hat version 5.x or 6.x , My question is , what the equivalent VPN version that I ...
0
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1answer
209 views

how to whitelist or deny “enable” mode IP address to cisco 3750 switch

I have a Cisco 3750 switch and I want to modify the allow/deny IP addresses that can access it in ssh and "enable" mode. Not sure how, and googling is nearly impossible to get this info it seems.
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105 views

Routing through SonicWALL SSL-VPN and Cisco L3 Switch

In the image above, we use the SonicWALL NSA 3500 at our gateway and handle VPN with its SSL-VPN. Our Layer 3 Cisco switch is our core network switch and handles about a dozen VLANs. Most VLANs ...
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1answer
52 views

Installing new Cisco MIB

I'm having issues exposing firewall information via OIDs on a Cisco IOS device (c7200-ik9s-mz.124-25c.bin). It seems like either the IP-ACCESS-LIST-MIB or the CISCO-ITP-ACL-MIB would supply that ...
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0answers
40 views

Is there a simple command to delete multiple ip sla policies?

I have a Cisco 819 router and on it there are a lot of ip sla policies. when I run the sh runcommand I get the following; ip sla auto discovery ip sla 2 http get http://www.facebook.com cache ...
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1answer
101 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 ...
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0answers
75 views

Unable to monitor Cisco route tables with SolarWinds

I recently switched from scanning a linux-router based network hosted on CORE emulation software, to scanning Cisco IOS routers hosted on a GNS3 emulation with SolarWinds. Everything seems the same, ...