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Hi, We have a 2951 router which we are using for CME/CUE for about 20 phones. We use an ITSP sip trunk for incoming/outgoing calls. It is on a recent IOS - Cisco IOS 15.4(3)M5 (UNIVERSALK9) The issue we are seeing is after several days, we cannot use...

Hello all, I have a question about the native vlan feature on trunks a simple configuration interface fa0/0 switchport trunk native vlan 4 switchport trunk allowed vlan 5,6 in all the labs I could do, this config prevented the native vlan from wor...

Hello - We are setting up two routers to peer with an ISP via BGP using ISR4431.  The two routers are separated by about a mile through DWDM Fiber.  So I need an SFP port gig 0/0 between the routers to carry the cross traffic.  On the LAN Side I have...

hello everyone.  I have some problem and need help, I have 3 vlans created in 2 layer switch: vlan 10 -> 192.168.10.0 vlan 20 -> 192.168.20.0 vlan 30 -> 192.168.30.0 and there are 3 PCs and they are associated to their vlans: PC1: 192.168.10.2 and d...

herooft01 by Level 1
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                   Hi,I noticed for both N2K models same price. However the E variant (enhanced) has bigger buffer  size (SAN, big data).Why should I still quote the N2248TP if I can buy the E for the same price with better specs. Or in other words, ...

janvandek by Level 1
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I just configured 2 ports on 2 separate Nexus 3K using VPC and LACP and connected to an AIX box configured for 802.3ad and it is acting a bit strange. If I bounce the port channels on each i see the MAC of the NIC's then a few seconds later they reve...

Hi everyone, (hopefully not a double post, first upload seemed to fail) maybe someone can help me understand a little better how MST works. Following scenario: Network set up in a star topologyCore-Switch is STP root, acces switches connected via sta...

Hello, I was asked this in an interview and didn't know the answer and has been driving me crazy ever since. So you got 2 routers, R1 has a loopback interface of 1.1.1.1 You put two static routes in R2 to get to 1.1.1.1. Specifying the IP of R1 on...

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