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Cisco Nexus 3064PQ CPU spike causing packetloss

Nexus 3064 CPU spike and packetloss I have L3 Cisco 3064PQ switch which is running latest "nxos.7.0.3.I4.7.bin" basically I am using for routing so my ISP 2x10Gbps link terminated (with LACP) on single switch (without STP,vPC) it and currently live…
Satish
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3 answers

Cisco ASA 5510 - ACL Config Question

My company's email server is under attack from the following IP address blocks 92.63.193.0 5.188.9.0 Here are the corresponding WHOIS records for each network % This is the RIPE Database query service. % The objects are in RPSL format. % % The RIPE…
Richie086
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Wireshark TCP and window size

Can please someone explain me on the below screenshot why host 192.168.1.200 on packet 9 sends an ACK for the packets 6 - 7 - 8? The total packet size does not correspond to the window size agreed. If I understood it correctly the window size is the…
user3249
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3 answers

Is UDP Usage in Routing Information Protocol (RIP) a Secure Practice?

I know that UDP is a connectionless transport layer protocol. Since it is easy to fake your source IP and source Port in your headers, what keeps anyone from poisoning routing tables via RIP? It seems to me like I can easily flood routers with fake…
Ninja Bug
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1 answer

2960X Management VLAN

I have a Cisco ws-c2960x-24td-l running 15.2(2)E7 I have created a management vlan (500) and want to put the management interface (FE0) into it, however the "switchport" command is not available for this interface. Can somebody let me know what I am…
B. Austin
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Calculating 3 way TCP Handshake Duration

I want to calculate the time that the 3 way TCP handshake occupies through wireshark between a server and a client. I get something like: Time Source Destination Info 0.00 x.x.x.x y.y.y.y SYN 0.020003 …
baskon1
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2 answers

IP Address starting with 253

I have no idea if this is the right place to ask this question, I'm very sorry if it isn't I have here data containing an IP address that starts with 253.45.xxx.xxx But I've looked up everywhere and I'm being told that there is no way an IP address…
user9672636
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Cisco 1200 AP, client information from CLI

I'm working with several cisco 1200 series APs, trying to get relevant client information off of them. It would be helpful to see RSSI and SNR for individual clients connected, but I am unable to find any commands that are related to this. I've…
walkerboh8806
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1 answer

What's the domain of an IP?

CIDR stands for "Classless Inter-Domain Routing". But what's a domain in this case? Seems to not be the same kind of domain as DNS deals with...
lindhe
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802.11ac: What is the benefit of MU-MIMO?

Say you have a 3x3 AP and three clients. Without MU-MIMO, one client can receive three spatial streams per time slot. With MU-MIMO, three clients can each receive one spatial stream per time slot. However, the total link capacity per client is still…
elin05
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3 answers

Mount a 2U router on a wall

I have been unable to find any information or specific mounting brackets to fasten a Cisco 3825 2RU router to a wall, so I am wondering if anyone here has experience with this. I have the regular rack mount brackets, but unlike other model routers,…
WaxTrax
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Is it possible to have ranges in two octets in an ACL / object-group

I'm trying to find out if there is a "clean" way to do this. I need to setup a ACL on a FWSM that effects devices over multiple subnets. The structure looks like this: 10.10.1-254.1-15 I could do: object-group network example network-object…
evolvd
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What is a FEC in MPLS domain?

Does FEC correspond to a Next-hop ipaddress or Destination Ipaddress or a combination of Next-hop/Destination Ipaddress and QOS values ?
Hemanth
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How does Ethernet Switch ensures the validity of the MAC address table?

Let us say I have switch S with 4 ports, PA, PB, PC, and PD, to which I have connected 4 hosts, A, B, C and D with the MAC addresses AA:AA:AA:AA:AA:AA, BB:BB:BB:BB:BB:BB, CC:CC:CC:CC:CC:CC and DD:DD:DD:DD:DD:DD respectively, in the same order. Now…
Deepak
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Is it possible to run an IPv6 only MPLS core?

I am looking for information on whether it is actually possible to run an IPv6 only MPLS Core with respect to the transport labels, without the current requirement to tunnel across IPv4. To put this into perspective, I am running a dual stack…
DrBru
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