Cisco is a major provider of networking equipment. 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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6 views
VPN needs ping directly to a device from the remote ends ASA in order to allow traffic
I ran into a little bit of an odd issue this morning. I have a site-to-site VPN tunnel that is up and correctly passing traffic between two sites. Interesting traffic is specified as a /24 at the ...
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0answers
15 views
Cisco L2TP client only (no IPSec)
I'm trying to configure a Cisco router (2801) as an L2TP client. My ISP has provided me with a static IP, and in order to use it, I need to set up a tunnel. I've been given the following info to set ...
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0answers
13 views
help with networking [on hold]
i have three 1841 routers and two 2950 switches. i am trying by best to connect the 2950 switch to work with the 1841 router, but i haven't a clue where to start or what i should do first. plus i am ...
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votes
1answer
26 views
Understanding CISCO Outbound NAT
We have the following configuration:
interface Dialer0
ip nat outside
ip access-group 101 in
exit
interface GigabitEthernet0/1
ip address 192.168.2.1 255.255.255.0
ip nat inside
ip ...
2
votes
1answer
46 views
Understanding Cisco Extended ACL
I am trying to limit access to our SIP servers to only 209.85.2.10 however,
I am getting a little confused by the permit ip any any log. Will it not allow everything in? Without it, I loose all the ...
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0answers
14 views
cisco asa dropping connections periodically
I found in ASA (5540 & 8.4.2) ,the connections are dropping and reconnecting periodically.What could be the reason.I found this on ASDM traffic satus at connections per second usage.Attached ...
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0answers
13 views
high CPU usage and drop in data transfer from site to HQ
In the next topology I face a problem in CPU usage and data transfer from site to HQ
During the handheld data transfer from one site to server in HQ ,CPU usage in all site switches (SW1,SW2,SW3) ...
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votes
1answer
23 views
Why am I not seeing a spanning tree instance?
i86bi-linux-l2-adventerprisek9-15.1a.bin on Cisco IOU via GNS3
I set up the following topology in GNS3:
All I did was power on the devices, connect them and do a 'no shut'-command on their ...
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0answers
7 views
restricting vty access nexos
I've created an acl to restrict inbound access to a nexus 3k and have applied it to line vty:
access-class vty-acl in
I've previously configured 'transport input/output ssh' and 'transport preferred ...
0
votes
1answer
37 views
In 2011, Cisco said the Internet would reach the “Zettabyte threshold” in 2015. Has this turned out to be true?
http://www.theguardian.com/technology/blog/2011/jun/29/zettabyte-data-internet-cisco
Cisco sees the movement towards the exabyte as an inevitable endpoint of the growth in video traffic online. ...
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1answer
33 views
Does clos (Leaf-spine) always mean overlay?
I'm curious,
I have a small datacenter in which I'm deploying a very flat structure (like arista's network). I have two nexus 9k's and two fex's attached. If we are to grow larger I'd like to move ...
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votes
2answers
23 views
PAgP over transparent wireless point-to-point links
We have 2 buildings which are interconnected by 2 wireless P2P links. One is used as main connection, the second one is for redundancy and backup. So far, we have these 2 buildings in flat L2 network ...
2
votes
2answers
34 views
Why do static routes not need a “default-metric” set when redistributing into EIGRP?
Good Afternoon,
I ran into an issue this morning where static routes on a certain device weren't being redistributed into an EIGRP process configured on the same device. I'd originally thought this ...
2
votes
0answers
84 views
Port Forwarding and Route Map Cisco
To have the RTP media range (10000-20000) flow to the server behind nat I needed to add the following route-map:
ip nat inside source static <pri> <pub> route-map voip-rtp extendable
...
1
vote
2answers
46 views
Port Group Cisco 2960X + HyperV or any server
First of all thank you in advance trying to solve my issue.
I'm trying to Team 4 NICs on HyperV and QNAP server to my switch Cisco 2960X in order to get 4Gbps data transfer rate to backup data ...
0
votes
2answers
59 views
Possible issues on having separate Guest Access Points?
I'm sure one of you have done this before. So our company has decided to have a separate physical network for Guest WiFi. This means putting up a new Cisco Wireless Controller and Access Points. We ...
0
votes
1answer
40 views
problem with inter vlan routing with ip helper
here i used the recommendations of making the DHCP server an external server and just use the command IP helper X.X.X.X in cisco 4500X under each interface vlan to relay DHCP to hosts in this vlan , ...
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1answer
15 views
CCP Running issue
i already have installed Ccp but when i run it it tel me that message [[Cisco configuration professional requires adobe flash player 10 or above]]
=======
although i have adobe flash player 18 and i ...
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0answers
17 views
Upload Cisco switch IOS from a Mac using Xmodem [closed]
I'm looking for a free program for Mac that I can use to upload the Cisco switch IOS using Xmodem? I've tried Zterm and Minicom which both failed, even though Zterm said it successfully uploaded the ...
1
vote
1answer
27 views
DTP mode desirable and on [closed]
the on mode still negotiable (send/receive DTP) until i set it no negotiate so what is the Difference between on and Desirable.
please give an example :))
3
votes
3answers
103 views
link aggregation between switch and router
Here i have this topology in my company
cores configure with VSS, As we can see single link connecting each router to each core which make this link single point of fail, so I need to add link ...
1
vote
1answer
53 views
Cisco ASA 5505 stop passing traffic randomly
I have a very strange issue with Cisco ASA 5505 started about week ago: ASA like a router with outside port to ISP, next port to DMZ and another one to inside network (contains about 50 hosts thru ...
0
votes
1answer
30 views
ping domain name using sourced interface
Problem :: i want to be able to ping a domain name sourcing from a particular interface on a cisco router.
Scenario :: i have Router-A, it has a management address of 1.1.1.1, i can only connect to ...
0
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1answer
25 views
Change Cisco VPN User Password Question
I have telnetted into a Cisco 2851 Router with 7 set users with passwords for a PPTP VPN that show in the following format when I "show running-config":
username user1 privilege 0 password 7 ...
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2answers
33 views
OSPF between Cisco and HP devices
Does anyone have experience with creating HP and Cisco devices? I created a simple OSPF config, but I can't see any neighbours.
Here is my basic config.
#
#HP 5500-48G-PoE+-4SFP HI Switch
#
router ...
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4answers
53 views
Inter-VLAN Routing and Proxy Arp
the network above shown has PC1(10.10.10.1) AND PC2(10.10.10.2) IN VLAN 10 10.10.10.0/24
AND PC3(20.20.20.3) and PC4(20.20.20.4) in VLAN 20 20.20.20.0/24
I have configured all the configuration ...
1
vote
2answers
74 views
Difference between proxy arp and default gateway
Firstly what I understand,
Default Gateway--> When we set the default gateway in PC the network layer check the destination IP address and if it is not on same broadcast domain as the source IP ...
0
votes
2answers
60 views
Which OS is used with CISCO SG300-XXX
I can't find any infromation about which OS is used on the SG300-Switches by cisco, maybe you can help me with that.
0
votes
1answer
32 views
Stateful vs Stateless IPv6?
What's the difference here?
Are stateful IPv6 entries retained in the DHCPv6 server?
0
votes
1answer
42 views
IOS tools to discover a network
I would like to learn/discover a new topology. I usually use these commands. Do you know any other good tools for this? (the network have routers, switches, firewalls, multiple vrfs, vlans and all ...
1
vote
1answer
40 views
Cisco ASA 5510 ESMTP Inspection
having an ASA 5510 (8.3(2)).
2 Interfaces: 1. NGCC, SecurityLevel 20, one Host with IP 1.2.3.4 Microsoft ESMTP MAIL Service, Version: 8.5.9600.16384 on Port 25 2. DMZ, Security Level 20, one Host ...
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1answer
28 views
What is happening during CHAP PPP authentication between Cisco routers?
I'm going through the great CBT nuggets series for the CCNA.
In the video on WAN protocols Jeremy sets up a PPP connection between two routers using CHAP authentication.
On each router he adds a ...
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votes
1answer
78 views
OSPF NSSA load balancing
I have a OSPF network partitioned onto 2 areas as shown in the Figure below.
Area 4 is configured as a NSSA with no-summary which receives only default route. Routers R3, R4, R5 are redistributing ...
3
votes
1answer
54 views
Deploying Active/Standby ASA 5508-X pair - Need SMARTnet on both?
I'm planning a deployment of a pair of Cisco ASA 5508-X firewalls in my co-location facility. I purchased the first unit with SMARTnet since it's a newer product and I wanted to get used to the ...
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0answers
24 views
IPV6 Support For Cisco Nexus Switches
Does CISCO Nexus 3548P-10G L3 Switch Supports IVP6? What are some other alternative L3 Switches with same or slightly higher hardware configuration as CISCO Nexus 3548P-10G and IPV6 support
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votes
2answers
33 views
Dynamically use a different NAT destination interface
I am using a LTE Router with a Cellular interface.
I have a private LAN (/24 mask), so I'm using NAT to translate my private subnet in order to use the external public IP that my provider assigns to ...
0
votes
1answer
57 views
Stacking Cisco Catalyst 3850 via Fibre?
I'm working at several new network concepts for our company and the challenge is to stack at least two Catalyst 3850 over a distance of 200-300 meters. I know there are other possibilities like VSS or ...
1
vote
1answer
23 views
Encapsulation of ERSPAN in a linux host (Not cisco switch)
Is there a way to ENCAPSULATE traffic into an ERSPAN tunnel without using a cisco device? What if I wanted to source ERSPAN traffic from a Linux host instead of a switch?
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1answer
45 views
Cisco Switch Can't Ping Attached Device
PC1-VLAN1======Switch : Successful pings from the switch
PC1-VLAN2======Switch : *Unsuccessful* pings from the switch
I've got a single switch with a static IP directly connected to PC1 with a ...
0
votes
2answers
65 views
Router-on-a-stick / Inter-VLAN routing with a CISCO 800 Series (878) router
I have 2 distinct network segments (192.168.10.0/24 & 192.168.1.0/24) in my company, and we need them bridged. The thing is the only equipment I have available is a CISCO 878 router that, ...
-1
votes
0answers
26 views
Multicast traffic dropping
The current setup is as follows
server(multicast) port 24 (switchport mode trunk) --> connected to a cisco 2960 --> from that cisco device to a port facing a QnQ link port 28 (switchport mode trunk) ...
0
votes
1answer
25 views
Cisco ASA Static NAT with SLA tracking
I don't believe this is possible iwth the Cisco ASA series, but figured I would as the community.
If I have an Cisco ASA, can I use the sla feature to track a NAT statement? for example. ...
0
votes
0answers
25 views
Issue with voice performance between two ip phones at the same site connecting to two different CUCM?
I have one branch which is (branch-1) with two groups of ip phones, one group is connecting to CUCM-1 in HQ and the other group is connecting to CUCM-2 in the branch (branch-1) and the connectivity ...
-1
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1answer
52 views
header checksum error in wireshark
hello all , I am not able to understand what kind of error is wireshark showing me please refer picture
need help.
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1answer
31 views
Remote desktop to an offsite PC that is connected to the VPN?
I have a PC offsite on which I need to create a local admin account for someone.He can login onsite via a normal user account and connect to the network through the vpn. I want to know if it is ...
1
vote
3answers
119 views
how to get port/interface status of cisco switch via snmp
I am trying to write a simple program that displays the front panel of cisco devices remotely (in this case a 3560 switch). So I need to read the status of each port via snmp and turn on the LED on my ...
0
votes
1answer
51 views
How to Configure a Server with two NIC
I'm reformulating the question, once the previous provoked a little confusion.
I didn't find a way to subnet 172.16.1.0/26 between two interfaces. MY thought was to set device's gateway to the ...
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votes
3answers
67 views
Overlaps with VLANS
This's problem
SW_R2(config)#int vlan 2
SW_R2(config-if)#ip addr 172.16.0.129 255.255.255.240
SW_R2(config-if)#int vlan 3
SW_R2(config-if)#ip addr 172.16.0.145 255.255.255.224
% 172.16.0.128 ...
1
vote
2answers
96 views
Subnet-based vlan assignment on Cisco
Is it possible to assign to vlan based on the fact that the source IP is on a certain subnet? I have found the following reference from HP and Netgear, but I have been unable to find any such ...
0
votes
1answer
22 views
Cisco RV042G Multiple public IP
Is it possible for the RV042G or similar router to be configured with multiple public IP addresses on the one WAN interface?
