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Questions tagged [cisco]

Cisco is a provider of switches and routers to commercial consumers. Cisco devices run IOS or NX-OS operating systems. 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.

Cisco is a provider of switches and routers to many medium and large companies. Cisco devices often run IOS or NX-OS operating systems.

Since Cisco acquisition of Linksys, the consumer line of switches, firewalls and routers (which do NOT run IOS) have been rebranded under the Cisco name.

This tag is a generic tag - Wherever possible a more specific tag related to the product you are using should be used instead. For example:

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2629 questions
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Cannot ssh into cisco switch: Invalid key length

For some reason I cannot ssh into a Cisco Catalyst C3750 Switch. This is the error message, that I get: ssh_dispatch_run_fatal: Connection to 192.168.7.6 port 22: Invalid key length This is the SSH config, that I am using: Host 192.168.7.6 …
Mebus
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Recover from Cisco ASA 5508-X internal flash failure?

I was performing maintenance on a standby Cisco ASA 5508-X firewall that is part of a failover cluster. Upon reload, I noticed that the cluster status remained failed long after the unit should have recovered. I had datacenter staff connect a serial…
ewwhite
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How to buy from Cisco and/or Juniper when you're a small company?

I find it quite difficult to buy from Cisco and Juniper : no price-tags can be found on their websites, let alone buy-online capabilities a "buy cisco" google-search will mostly return websites selling used equipment. I've not found a single dealer…
Brann
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5 answers

How can I automate the deployment of cisco IOS upgrades?

I was googling this and didn't turn up anything. If you have 100 some odd Cisco routers and switches how do you push out new IOS releases? Certain not by manually logging into every device. The only thing I found was the Cisco Auto-Upgrade Manager,…
red888
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2 answers

rsyslog - configuration help - logrotate and compression

I am a newbie to Linux and rsyslog. I have used the logfiles for many years, but I have never had to set one up. At this point I have some Proof of Concept devices pointing to my Debain Linux server. I have the syslog messages coming in and being…
Security_Pete
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Do Juniper switches support vtp?

We have a mostly Cisco network, though for our access layer we usually deploy Juniper Virtual Chassis switches. To replicate this, we are interested in deploying a few juniper switches in our product development lab. The downside is we have well…
Matthew
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I have a Cisco Catalyst 2940 and want to connect to it via the network. How to find its IP address?

Since my computer has not serial port, the serial cable is of no help. Does the Catalyst 2940 acquire an address via DHCP? At least my DHCP server doesn't show any address which has been requested recently. Maybe the Catalyst has to be reset first?…
Holger Jakobs
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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 where X is the MAC address of the phone Parse the…
getsauce
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3 answers

Cisco Dot1x Port Authentication - VLAN selected based on what domain the user logs on to on computer?

Currently my company has been bought out by another. Due to this, another two companies users will be migrating into our office. It would be super handy if we could have the vlan chosen for the user based on what domain they try to login to using…
Lance
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How do I configure NAT rules when using ASA IP-SLA when leveraging post-ASA-8.3 NAT syntax?

We are currently running ASA9 at a location with redundant ip connectivity. We'd love to configure ip sla so that internet access survives a single carrier outage. I'm aware of the ip sla commands, however when I've tried to prepopulate the…
Peter Grace
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3 answers

Mixing SFP's with different speeds

I need to install new SFP's in a location; however, I need them to connect to existing switches and I'm not sure what SFP type they are. All I know is I've got MM Fiber. If I installed Cisco GLC-SX-MM 1000Base SFP's, would that cause an issue if…
Ryan
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3 answers

how to get interface traffic snmp information for routers ( cisco, zte, huawei ...)?

I have cisco, zte, huawei routers..How can i get the traffic information of every interfaces of these routers. I donot have mib file of zte and huawei. So, i want a generic mib file which can monitor every interfaces of these routers
padam gurung
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1 answer

ASA site-to-site IPSec vpn to linux ipsec-tools endpoints stops working after a random period of time

We swapped to ASA's over the weekend, and we replaced our VPN infrastructure which was previously based on openvpn and are now using IPSec between our ASA 5520's and our other sites that have linux (CentOS) routers. The VPNs connect just fine, but…
Peter Grace
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1 answer

Cisco ASA Config for PCI Compliant Office

We have a small business office, but due to PCI compliance we need to segment this into two internet networks (one 'compliant' and one for any other devices to use). We currently have a Draytek modem/wan load balancer which also has firewalling but…
Ben
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4 answers

Is it possible to ping through a NAT?

It it possible for a PC behind a NAT ping to a device that is on the outside of the NAT and get a successful response? (assuming the firewall permits it) This is a Cisco RV 120W router
700 Software
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