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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1answer
29 views

Figuring out the most efficient use of an ip range

I am working with Packet Tracer atm and have 3 subnet plans : assigned(management(104users) staff(43 users) admin(35 users)). I have an ip address range of:38.191.0.0 and subnet mask of ...
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9 views

Is this the proper way to utilize route-maps for intervlan routing?

screenshot of network map The network is pretty simple. Router-on-a-stick for nat/WAN access, Layer 3 switch for intervlan routing. Router: ip nat inside source list nated-nets interface ...
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11 views

Cisco ASA PBR and multiple ISPS for multiple SIP Providers

Have a question about policy based routing on my Cisco ASA 5515 running 9.5 and think despite it being available in this software version that I might be screwed. I have an asterisk PBX behind the ...
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1answer
21 views

If you switch an interface's vlan does it stop traffic?

I'm configuring a cisco catalyst switch and I want to change the vlan for the all of the ports on the switch away from the default vlan 1. I know how to change a vlan on an interface, I want to know ...
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2answers
17 views

Router doesn't allow loopback, can I use MS DNS to internally forward my .com to the local IP of the IIS server?

My websites are all on public IP x.x.x.110 My dev computers wan IP is x.x.x.111 From within the server, I can type my sites .com address into IE and it loads fine. But if I try them on my other ...
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1answer
25 views

Debian as VPN Server for Cisco ASR

I've to set up a Debian Server who should connected by a Cisco ASR via Side2Side VPN with a preshared key. Tried Open-VPN, but found out that both sides need Open-VPN. So the Cisco ASR is the VPN ...
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0answers
12 views

DHCP snooping on distribution layer stops cliens on access from getting ip address

Here is my topology: sw1(gi0/1 trusted port)->sw2(gi0/1 trusted port)->core-sw(gi0/1)->DHCP_server at the beginning i only configured sw1: ip dhcp snooping ip dhcp snooping vlan 18 int ...
1
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1answer
30 views

Operating Temperature of Cisco routers

I am managing a small server room containing different pieces of networking equipment e.g. cisco3900, paloalto appliance, pc routers, various switches. The issue is that our server room has been ...
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11 views

authenticating Cisco IOS against FreeRADIUS not responding

My company's looking to move from local authentication on it's routers and switches to a central RADIUS server which I have been tasked with developing. I have the FreeRADIUS server properly ...
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0answers
21 views

Cisco 3750 intrer-VLAN routing not working

I've defined three VLANs on my 3750 switch. I've also enabled the routing on it. It is a standalone switch. But the routing is not working between the VLANs. I don't know what to do. There is the ...
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0answers
7 views

Cisco ISA 550 firewall VLAN physical ports removed

I was adding VLANs and by mistake I added all my physical ports as "Access" to the last VLAN. Now, all my other VLANs are out of network. How can I fix it?
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3answers
59 views

Linux ssh client log all commands

I'm going to setup a Linux console box for login to Cisco devices via ssh only from that Linux machine. How I can setup ssh client on Linux to log all commands applied to Cisco devices?
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0answers
14 views

How should I use Cisco ASA 5510 and Catalyst 3550 together

So I took on a project at my job moving four separate networks into one Colo center. Currently I broken everything down from the four networks into 4 VLANS on the ASA 5510. Each are assigned IPs ...
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16 views

Self signed Cisco VPN Certificate

So I just rented some servers protected with a Cisco Firewall from a data center provider. I plan on accessing these servers through VPN. The instructions from the data center provider was to ...
1
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0answers
18 views

Cisco ASA 5510 ASDM 6.4 (2) unable to do port translation

I have a situation, where I want to do port translation. For example I can acces my service outside ip:8081 that is forwaded to server:8080. I should have a NAT rule option to add PAT like in this ...
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1answer
64 views

ASA INSIDE to INSIDE traffic being dropped

An ASA 5505 is being used to route between two networks as it contains routes to everything. The following depicts the network topology. I have tried various combinations of access lists such as: ...
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1answer
31 views

How to do static routing via next hop address?

i know the command is ip route [remote address] [next hop address] but how do i implement it? Currently these are the only ones that are connected: CALOOCAN - MAKATI MAKATI - NAVOTAS SWITCH0-PC0-PC1 ...
2
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1answer
42 views

Juniper EX3200 connected to Cisco 2900 series router - incomplete ARP entry

I'm tying to connect a Call Manager Express running on a Cisco 2900 series router to a Juniper EX3200 switch. I have both configured on VLAN 4, with both ports in access mode but when I connect the ...
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0answers
29 views

IPv4 over IPv6 IPsec tunnel

I've got two Cisco 2811 routers, both with a global static IPv6 adress, and an IPsec tunnel between them (using VTIs). Is it possible to send IPv4 traffic over this tunnel? The relevant parts of the ...
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0answers
18 views

WCCP to Remote Cache Engine - Any limitations?

I am attempting to WCCP to a remote (cloud hosted) cache engine from an ASR 1900 series router that is performing NAT. According to my reading (which was mostly done on ASAs) the WCCP cache engine ...
0
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1answer
33 views

RIP versus OSPF

If in my network there is a RIP, EIGRP, OSPF then a request is sent and It may pass to any of the 3 protocols, which among the three has the highest priority or the protocol that is being executed?
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2answers
55 views

VLAN sending data to ports it shouldnt have to

I noticed (based on activity lights) that VLAN traffic between two switch ports are being sent to many switch ports. Here's my scenario: Port 1 is a "mode access" switchport for VLAN 100 (untagged ...
4
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1answer
231 views

VMware VDS ERSPAN decapsulation on Cisco Nexus 7k and mirrored to local port

We are setting up a mirror/span/rspan/erspan to get traffic (DC's live as VMs in ESX Cluster) to our Microsoft ATA server. The problem that we are running into is that a traditional RSPAN is not ...
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0answers
56 views

Clients on one VLAN are able to access all but one IP on a separate vlan

So I am having an issue where clients on one specific subnet are able to access all servers on a separate subnet except a server with a specific IP address on another. Any other client on any other ...
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1answer
22 views

Is information transmitted over Cisco routers saved anywhere on the router itself?

Everything is in the title: Is information transmitted over Cisco routers saved anywhere on the router itself?
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1answer
29 views

ACL list to deny even networks

I wonder if you can help me. I am trying to set up an ACL. I have a network - 172.16.1.160/27 and I need to deny hosts with an even number in the last octet. What wild mask would I use to do this? ...
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0answers
22 views

Configure Cisco QoS for VLAN

I have two VLANs (20 and 21) that are accessing the same resource on a switch. Clients on VLAN 20 access this resource only at schedule times, but when they do, they generate lots of traffic as ...
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2answers
30 views

Cisco 1841 Router from STATIC to DYNAMIC Configuration

Basic PC-to-Internet Ethernet Configuration I'm trying to find the proper configuration in the IOS to have Fa0/0 = DHCP and Fa0/1 = STATIC-only, to allow packets from the STATIC side (inside network) ...
1
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1answer
36 views

Correcting Time Problems - Cisco Switch - DHCP Options Daylight Savings Time

I inherited quite a network in terms of centralized or correct configuration. The prior administrators did not configure many basic services correctly and myself and my Senior Administrator are now ...
0
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2answers
44 views

Freeradius is ignoring Packets

currently i'm installing a Cisco ASR1k as an PPPoE BRAS. I'm using freeradius as authentication service. The setup is an Ubuntu 14.04LTS with a quite outdated freeradius 2.1.12 installed via APT. ...
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0answers
25 views

Shrewsoft VPN passthrough Cisco ASA 5505

I have a shrewsoft VPN connection setup that passes through a Cisco ASA 5505, it manages to connect okay and i am able to ping etc but if i try to load anything e.g. web interface nothing is returned. ...
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1answer
10 views

Configure Cisco 2801 that has NAT overload to allow access to WAN from LAN

I have a server behind my Cisco (IOS, not ASA) that is running NAT overload (PAT?) with port forwarding for specific services (http/https) to a statically IP'ed server that is on the same subnet as my ...
1
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2answers
30 views

Cisco ASA 5505 - Help understand/update the config

Let me preface by saying I am not a network administrator by trade and this firewall was set up originally by a Cisco consultant who is no longer available. We have a small office with a Cisco ASA ...
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0answers
20 views

Cisco UCS SNMP configuration 'scope fault' for sending test messages to trap

I'm attempting to configure and test SNMP and have figured out the GUI portion with adding SNMP traps and users. My question is which mode do I need to connect to or scope to so that I can 'scope ...
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1answer
19 views

Cisco ASA5505 - icmp deny any outside breaks internet - how to block outside pings?

We want to block any ICMP requests that are initiated to our network from the public internet. I ran icmp deny any outside, but when I do that, it takes down our internet - nobody can load web pages. ...
0
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1answer
20 views

Connecting two Cisco Routers on the same subnet via ethernet

We have two routers. One is a Cisco UC540, the other is a Cisco 891F. The UC540 manages our VOIP but has been reaching maximum CPU usage. We are trying to separate our data and our voice networks ...
0
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1answer
29 views

need to add IP access list to ACL for Cisco Switch Access

Can't figure out what I'm doing wrong here. I could not access my Cisco 3750 switch from the data center IP earlier today. It's in extended IP list but not standard. I can access from both IPs in ...
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0answers
34 views

Remote Desktop can not access LAN PC

Have a Cisco VPN - I am able to login, and RDP to the SBS server. When I try to access the LAN PC's they are not responding. ireshark the connections on all the PCS at the time of the request, and I ...
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0answers
11 views

time based policy map on cisco 6500 with sup720 cards

We are trying to limit an internal subnet (/24) to a bandwidth limit of 15 mbps during the week day time. It seems to constantly be limiting the subnet during all times however: PCN6500#sh policy-map ...
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0answers
15 views

Cisco catalyst network module 3850-nm-4-10g link is off

I am going through the installation guide for the cicso module referenced above and It says if the leds are not on that "link is off". It doesn't say what this means or what causes this. Is it just a ...
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0answers
41 views

Trouble Shooting errdisabled Cause

I have a Cisco Catalyst 3850. I added a network module with 4 gbic for fiber connection. The module is not showing any lights on either side of the connection. After the searching the depths of the ...
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0answers
42 views

DHCP option 43 on switch Dell PowerConnect 5500

I have Dell PowerConnect 5524. Put SW01(config-dhcp)# option 43 hex f104ac1338fa got Option code 43 is not a valid HEX string. Strange. Its worked ok for me on Cisco device. Looking at User ...
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0answers
40 views

How to use SNMP to get port state of all VLAN in Cisco switch

I am working on using SNMP to get the state of the port of a spanning tree. I used OID .1.3.6.1.2.1.17.2.15.1.3 and it returned the state of the port. e.g. C:\Users\imuntol>snmpwalk -v 2c -c test ...
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0answers
9 views

Running GVRP and VTP on the same network

Within are network we have HP 5400zl switches with GVRP and CISCO 2950 switches with VTP. Is it possible to run GVRP and VTP on the same network without any problem? I know that GVRP and VTP not ...
2
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0answers
37 views

Cisco 2851, nodes on local network can access Internet but router can't [closed]

I am using a 2851, on GE0/1 I have a BT OpenReach VDSL modem and GE0/0 goes to a switch and the rest of my network. The desired configuration is pretty straight forward and mostly works, I want the ...
0
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1answer
48 views

bandwidth monitoring by TCP/UDP port on Cisco 2960 or Linux

We have an international line between two sites with limited bandwidth. I want to monitor bandwidth usage between the two sites, and understand which type of traffic consumes the most. Ideally I ...
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0answers
12 views

Is it possible to run the Cisco NX-OS 6.x copy command without the prompt to select a VRF?

I am currently working with a network scanning tool that logs into Cisco routers and runs commands on those routers. The problem I'm encountering has to do with what the copy command expects. The copy ...
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1answer
23 views

Cisco sg500-24p web-based configuration utility ip adress

How can i know what is the ip adress to the web-based control panel for my Cisco sg500 if it is not the default and if i don't want to rest the switch, i need to change vlan for a port ? The switch ...
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0answers
32 views

HP Proliant and Cisco 3560G LACP - Up Sngl-port-Bndl Mstr Not-in-Bndl

I have to connect two GigaEthernet ports to get 2Gbps. I´m trying to connect a switch 3560G to a HPProliant DL 380G6 to give 2Gbps to the server through the switch. I use LACP in switch in this way: ...
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0answers
13 views

configure SNAT on traffic over IPSEC VPN on cisco router

I have a site to site VPN to a cisco router from an openswan on linux. 10.1.1.0/24===177.19.158.163[+S=C]...189.125.24.142<189.125.24.142[+S=C]===172.16.100.0/24 The VPN is working properly. But ...