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1500 questions
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5 answers

Documenting Knowledge

I find a lot of people, as well as companies don't document their knowledge, or, do a poor job of it. I'd like to discuss what has been found to work well and not so well when it comes to doing this in the hope that we'll be able to assist one…
OzNetNerd
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1 answer

Cisco IPSEC VPN fail Stage 2

The HUB is managed at a data center with external IP 200.200.200.200. There are 10 remote offices. Office 9 HUB 10.1.9.0 - 100.100.100.100 ->> VPN <<- 200.200.200.200 - 10.1.1.0 In office 9 only, after…
MartinC
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2 answers

How do I know the switch is layer 2 or layer 3?

Is it possible to find the switch is Layer3 or Layer2 in (Switch)CLI? Is there any command to check whether the switch Layer(Layer 3 or 2) in CLI?
sjarasan
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2 answers

Undo last command(s) in case of losing connection to a Cisco Router

I would like to configure an interface on a remote Cisco router (ISR 4000 series) with IPsec. The only way to connect to it is through the interface that I am trying to encrypt. I want to ensure that I would not lose connection due to…
iokarag
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6
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1 answer

Is it possible to stitch a L2VPN connection into a VPLS domain on Juniper MX

I'm trying to connect one end of a L2VPN tunnel to a VPLS instance on a Juniper MX router. The L2VPN should act like a local interface in the VPLS instance. Is this possible at all? I can't find any information about how this could be done.
Sebastian Wiesinger
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6
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1 answer

Sticky mac learning PC mac as vlan voice on Cisco 3750v2

I have port security configured as follows: switchport access vlan 196 switchport mode access switchport port-security switchport port-security aging time 3 switchport port-security violation restrict switchport port-security aging type…
jpnetsec
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6
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1 answer

Is SFP+ backwards compatible with SFP?

Can I stick an SFP transceiver module in a SFP+ port in a Cisco Nexus 5K for example if I need to connect a fast ethernet switch with a 1 Gbps SFP uplink port? I saw this Nexus's ports are 1/10 Gbps. Does it depend on a switch module or is there a…
Alex
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1 answer

Odd stp issue on foundrys

I have 2 foundry devices running 802.1w which are both connected to an access switch which also runs 802.1w. The 2 foundry's are connected to each as well. I have the vlan configured on each of the devices to participate in spanning tree however…
Network Samurai
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6
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1 answer

Cisco + FreeRADIUS: Exec 15 level privilege mode

I have two routers: Cisco ISR 2921 with IOS version 15.0(1r)M9 and a Cisco C2600 which is an old guy with IOS 12.0(7)XK1. I have this set up on a FreeRADIUS server: router-admin MD5-Password := "" …
Alex
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NX-OS 9.3: ECMP polarization and "ip load-sharing ... rotate"

This is a "why and how exactly does this work" question. The given problem is already solved. QUESTION: I'm interested to understand what "rotate" in ip load-sharing address source-destination port source-destination rotate actually…
Marc 'netztier' Luethi
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2 answers

Do Wi-Fi clients interfere with each other?

I've read everywhere that wireless access points interfere with each other and should be put on distant channels. This even applies to access points on the same wired network with the same SSID from what I've read. Doesn't that imply that wireless…
The Phil Lee
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6
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2 answers

How does one send non-ascii characters through Cisco GSM SMS?

I'm currently using a Cisco 881G2 Router which has a Cellular interface. Sending Text messages from the router is as simple as typing the following command: cellular 0 gsm sms send Sending messages containing plain text…
KeyszerS
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6
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3 answers

ARP request outside of LAN; Target machine or router response?

If I sent an ARP request to the target machine, which is in over Internet and has 2 routers between, what will the target IP address on my request (0001) packet be? Will it be the Router IP address, which is my gateway, or will it be the target…
ebyrock
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2 answers

GNS3: Configuring/Emulating a Juniper Router on GNS3

I need to be able to emulate a Juniper Router (JunOS) on GNS3. I have seen that this is available as on option in the 'Node Types' list on GNS3. When I try to use this to add a Juniper Router to the simulation using the above Node Type, I get an…
thilina R
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2 answers

ISP edge router configuration

I need to configure Cisco 2901 router to route between interconnect block and usable ip block. Circuit is fiber 30Mb/s I got this info from ISP provider: IP space: Interconnect block - 50.204.xxx.80/30 Netmask: 255.255.255.248 ISP Internet gateway:…
user4608
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