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1500 questions
8
votes
1 answer

Catalyst 4500R+E, Sup7L-E Strange License Management

We have Catalyst 4500R+E with Sup7L-E (IOS XE 3.4SG). It was bundle with LAN Base License Installed. #show license summary Index 0 Feature: entservices Period left: 8 weeks 4 days License Type: Evaluation License…
Эдуард Буремный
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8
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4 answers

How do I set up a VLAN between an ESXi VM and Physical Hardware?

First of all, I am a total noob. The extent of my VLAN experience is setting up a guest network on a wireless router. I have recently gotten a request to set up a public network requiring filtering and throttling (via Untangle). Meanwhile, there is…
carl
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3 answers

MTU vs MSS? When to change MTU and when to change MSS?

Here is the question. When and Why do we decrease MSS instead of MTU. In the router that we can configure can configure both of them separately. Suppose I have kept MSS as 1260.I have not made any changes to the MTU. Now if the TCP and the IP…
Pratyush
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8
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1 answer

traffic engineering - policies for BGP vs static routes

Considering a transition of specific public Internet site via a new location. At the current location, I've got a static route configured in my Cisco router pointed to my internal firewall. The new location is located over an MPLS connection…
raidORlostark
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8
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1 answer

Private VLANs on a switch that doesn't support Private VLAN trunks

I have a Catalyst switch that doesn't support PVLAN trunks (Sup4, 4500, 12.2(54)S). I have multiple other Catalyst switches, 3750 metro, that do. Am I correct in assuming that because the C4500 does not support PVLAN trunks with that Supervisor,…
Arima
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8
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2 answers

Will STP lose data whilst switching from a failed link?

In a network with a dual-redundant link between two switches, will any data be lost during the switchover from an active link to the blocked link when the active link fails?
Greg
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2 answers

Juniper EX - disable multiple interfaces at the same time as a once off

I have used the Cisco interface range commands on many occasions to disable a large number of switching ports when the device is originally deployed as a once off and am looking for something similar in Junos. I don't want to use apply-groups or…
DrBru
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8
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3 answers

Will Linux send the ARP gratuitous or ARP probe (defined in RFC 5227)

I did an experiment to check if Linux will send the gratuitous ARP or ARP probe before using the target IP. The experiment scenario is as follows: There are two Linux computers, both connected to the same AP. I connected the one first and used…
Anakin Tung
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8
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3 answers

DHCP Relay by MAC Address of CPE

We are testing a new Provisioning Server in DOCSIS/CMTS environment and we need to setup a lab with 5 models of CPE. I'm wondering if we can configure on Cisco Routers the dhcp relay (ip helper) accord with the MAC address of CPE. The goal of this…
cgasp
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1 answer

IOS changes the SNMPv3 engineId

I have encountered a very strange problem when configuring remote target engineId on a Catalyst 3750 switch. The switch changes the engineId, it puts a zero between the two last digits. As shown below it changes ...e166 to ...e1606. I have tried…
andbos
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8
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1 answer

FEX 2248 private-vlan host association causes int to show "inactive"

When turning up a new port on a 2248 FEX, when the "private-vlan host association primary secondary" command is put on an interface BEFORE the server is cabled up, the interface goes into an "inactive" state and will not come up by bouncing the…
packetwrassler
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1 answer

packet capturing

I am having a hard time understanding certain terminology and setup when it comes to packet capturing. Example. At my company we use NetScout and the various services such as PFS(Packet forwading switch) and TAPs and Infinistream. My problem is what…
Michael Moore
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8
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1 answer

Switch replacement procedure 3560G to 3750X

My company will upgrade two Cisco 3560G switches (an HSRP Active & Standby pair) to two Cisco 3750X switches in a stack. I need to make a switch replacement procedure starting from removal of the Cisco 3560s switches until the Cisco 3750x switches…
Tsubasa
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8
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3 answers

Point to point LAN using two sonicwalls at seperate locations

We have a two-location business with our head quarters in Arlington, and a remote office in Dallas. Currently, both of our offices are running a sonicwall NSA 2600 and hold a VPN tunnel between each other (using the sonicwalls). We recently…
Eme
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8
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3 answers

Two SSID's for same VLAN - problems?

I want to test 802.1x on a test SSID. Wasn't sure if making a test SSID associated to a VLAN that already has another SSID associated with it would cause a problem with the customer facing SSID. Ex. SSID 1 = VLAN 1 SSID 2 = VLAN 1 - has 802.1x…
A L
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