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1500 questions
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1 answer

Cisco: Is it possible to see an EFP path within an EVC?

The topology diagram below shows multiple CPE devices, each has multiple WAN sub-interface that are dot1q tagged as VLAN 10 and 20 in this example. The PE ME3600 devices has an SVI with an IP address in a /24 range in VLAN 20 and each CPE has a WAN…
jwbensley
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3 answers

Does anyone know how to import ssh public key to ASR9K (IOS-XR)?

I am trying to login ASR9001 router using ssh public key authentication. I tried to import my ssh public key to the router but no success. RP/0/RSP0/CPU0:ASR9K-1#crypto key import authentication rsa disk0:/test.pem Cannot execute the command :…
Minsuk Song
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5 answers

Connect a POE VoIP phone to a non-POE Switch

I'm working on a project where I need to make a network for all PCs in the site. I need about 8 Ethernet sockets in each office of the site. I found that there's already two Ethernet sockets in each office but they are connected to VoIP phones…
Ehab
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1 answer

What behavior results from both ip dhcp pool and ip helper-address?

If a device has a dhcp pool defined: ip dhcp pool DATA network 192.0.2.0 255.255.255.0 default-router 192.0.2.1 domain-name test.net But it also has a DHCP helper setup on the interface: interface GigabitEthernet0/1 ip address 192.0.2.1…
glallen
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7
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2 answers

cannot remove vlan names

Hi I was practicing creating vlans and assigning them to ports however I cannot remove the names. CCNA-SWITCH1#show vlan VLAN Name Status Ports ---- -------------------------------- ---------…
NAUK
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4 answers

Should I locate SNMP poller near DB or monitored devices?

With SNMP pollers, is it better to locate them closer to the DB to ensure the poller to DB traffic has a better chance of making it. Or put the poller closer to monitored device, so that traffic is more accurate in terms of latency and making it to…
Ken
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7
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4 answers

Cisco Catalyst 4500E - modules installation

I have the following questions on Catalyst 4500E hot-swappable hardware components; Is it possible to insert/pull out line cards to or from powered on chassis? Is it possible to insert redundant supervisor to powered on chassis? Is it possible to…
Эдуард Буремный
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2 answers

VPN routing for hosts with multiple ip addresses

I use Mikrotik RouterOS as the NAT router. Some hosts behind the router also have a direct connection to the Internet and these hosts have a default route to the ISP's gateway instead of RouterOS. I set up a OpenVPN server in tun mode on one of…
sdaffa23fdsf
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1 answer

AP's at remote faciltiy will not join local controller

I currently have a WLC 4404 running 7.0.240.0. Management Interface IP is 10.128.55.10. AP-management interface is 10.128.55.15. Remote facility (facility A) has a VLAN created for wireless (455) and a VLAN 455 interface created with IP…
Sleepy
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7
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4 answers

Why has a fiber optic cable stopped functioning on one of the allowable wavelength?

For a long time, a fiber cable worked on both allowable wavelengths, and now it does not. Is this a defect of manufacturing? Maybe it's due to weather, other external factors, mechanical damage, or aging? Is it possible to fix?
Apostle
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2 answers

HP Procurve 5406zl - ACL issue

I'm having an issue with an ACL on a VLAN interface. I've followed HP's documentation here: http://h20628.www2.hp.com/km-ext/kmcsdirect/emr_na-c02609963-3.pdf I want to do the following: VLAN 101 should only be able to communicate to VLAN 50 - no…
Panther Modern
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7
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2 answers

Etherchannel on 6509 (VSS) with interfaces from different type of modules supported?

We currently have 1 10GB Multi-Chassis etherchannel Between 2x 6509 (VSS) and 2x 3750-E (Stack). On the 6509 the etherchannel interface members currently run on the supervisor module VS-S720-10G. We want to migrate that etherchannel over to a…
mastrboy
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9 answers

Why can I send 127.0.0.1 to 127.0.0.0 on my network?

We have a product that runs over IP. This product comes in two halves that are supposed to be connected directly to each other over Cat 5e. All this works fine. For reasons that are not important, we have a customer that wants to ensure that it can…
David Anderson
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2 answers

TCP - Why do RST packets not require acknowledgements (and FIN packets do)?

From what I can tell, RST packets do not require acknowledgments. My question is, what happens if a RST packet doesn't reach the other participant? How can the other participant tell something has gone wrong? Will they just retransmit the original…
EL_9
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Why wireshark captures foreign / non relevant traffic on my plain access switchport?

On a company main switch (Cisco 3750) I have connected a simple Windows XP physical PC on a switchport (switchport mode access, switchport access vlan 30). NO monitor sessions exists on the 3750. Also, the PC has a single IP address on a single…
Elias Bats
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