What am I missing - can't get my new SG 200-08 Switch to handle Jumbo Frames
I have set the MTU size to 9216, saved the conf. and rebooted the box - however when I try to "ping -f -l 8000 xxx.xxx.xxx.xxx" through it (or to the switch itself) I recieve only "Request timed out"!?
I have tried MTU=9000 as well.....
F/W: 1.0.1.0
Is there anything, apart from increasing the MTU size, that needs to be done?
I currently have 4 3560 switches connected in a Mesh topology. These are all set to use Jumbo Frames and so are all the Servers that are connected to these.I now need to connect a 2950 switch to 2 of the 3560's which will have only desktop computers connected to it but i do not want to configure Jumbo Frames on this and any of the desktops.
View 3 Replies View RelatedI have two switches: Nexus 3064 (ver 5.0(3)U1(2)) and Cisco 6509.The 6509:
1 x WS-x6708-10GE 8 port Ten Gig module version 3.5, firmware 12.2(18r)S1.
2 x sup 720's, with PFC3A.
2 x WS-x6348-rj-45
4 x WS-x6748-ge-tx
The IOS is ipservicesk9-mz 12.2(33)SXH8b.Both switches have been running fine for quite a while(not connected to each other). I then ran a fiber connection between port Nexus:1/48 and 6509:Te9/1.When I ping (of any packet size) from the Nexus to the 6509 @172.19.4.254, the 6509's CPU goes to 100%. On occasion, we will get 1 out of 20 packets back in the reply.I reduced the MTU size on the three 6509 parameters until the CPU stopped going 100%.The magic number is 4175 bytes. 4176 and higher == 100% CPU.I am willing to put the fiber link to 1500, but how does one change that for just one port on the Nexus? I tried and it refuses to set the mtu. I also tried to setup a new service-policy but that didn't seem to work either.The Nexus users are all jumbo frame users. The users on the 6509 are all 1500 byte frame users, except for one user on a 1 gig port (ws-6748-ge-tx) line card. It is this user whom would like jumbos.
I've to enable it on 3750 and nexus 7K switches. what are the steps involved? can we enable jumbo frame per port instead of enabling globally? i.e. we will only have few ports that will be using jumbo frames, rest of the ports will be using default 1500 MTU size.
View 6 Replies View RelatedWe have a requirement to send span traffic to a destination port for monitoring purposes on two 5000s with some 2000 fex boxes attached.
Some of the servers are making use of frames larger than 1500. we have not changed any mtu configuration on the 5000 since installation, and I can see the policy maps is still on 1500.
My first assumption would be that frames larger than 1500 will not be dropped, but it seemingly not (see below). is there a reason why the switch would forward jumbo frames? Also, is there a limitation on MTU for span traffic? There is a MTU command under the span session, but the maximum is 1518. From what I can read the frame will be truncated if it exceeds this. Does that mean the fragments will be dropped?
RX
7495685816 unicast packets 249 multicast packets 147899 broadcast packets
7495833963 input packets 1426823388087 bytes
1608134 jumbo packets 0 storm suppression bytes
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How do I turn on jumbo frames on the e3200? I am using 1.0.01 firmware.
View 3 Replies View RelatedOn a 3750 switch, is it possible to configure jumbo frames only on certain interfaces and leave the other ones as they are?
View 9 Replies View RelatedI believe i've enable jumbo frames on our Nexus 7010, one in each data-centre.
system jumbomtu 9216. Also on the interfaces mtu 9216. And can see MTU 9216 bytes, BW 20000000 Kbit, DLY 10 usec on the port-channel between them. Though when i ping between vlans at each site with large packets i get 30% drops and if i set the DF bit in IP header to yes - 100% loss.
8798 bytes from 10.200.12.2: icmp_seq=19 ttl=254 time=8.024 ms --- 10.200.12.2 ping statistics ---20 packets transmitted, 14 packets received, 30.00% packet loss
I understand that jumbo frames need to be enabled end-to-end. I have two ESX hosts connected at each site. I want to enable jumbo frames for those ports, but what if not all host on the ESX are using jumbo frames, will I have drops and connection failures? So if i have two sites, each with a 6509 connected via a trunk and need to enable jumbo frames for a vlan between the sites how do I accomplish this?If I enable jumbo frames on the trunk link how does that impact other traffic between the sites?
View 3 Replies View RelatedI have a Cisco Nexus 3064 that I am using as part of a flat network for the Lab. I have 30 Virtualization Servers(MS HyperV and VMware vSphere) connected to this switch and I want to enable jumbo frames. The Virtualization Servers are able to ping the local VM's using 8K bytes. However I am unable to ping from server to server using 8K bytes. I have configuration (in abbreviation). All the servers are in the same network which I configured as L2 ports with the "switchport" command. However, the interface "MTU" command is unavailable in L2 mode. I am only able to get the interface "MTU" command only in L3 mode with the "no switchport" command on the interface.
# int eth1/2-45
# no switchport
# mtu 9216
# no shut
I can ping the servers with less than 1500 bytes, but anything larger fails.
According to this Cisco URL jumbo frames should be put into play by changing default ethernet system class.
Recommended configuration:
!--- You can enable the Jumbo MTU
!--- for the whole switch by setting the MTU
!--- to its maximum size (9216 bytes) in
[Code].....
I have a Cisco Catalyst 3100 blade in a Dell server chassis that is trunked to a 6509.
When doing a protocol capture, I see large frames being sent from one of the servers in the chassis.
Example:
TCP:[Continuation to #1701] [Bad CheckSum]Flags=...AP..., SrcPort=HTTP(80), DstPort=2667, PayloadLen=2831, Seq=1489611217 - 1489614048, Ack=1719592331, Win=65535
I see lengths up to 6900+ bites coming from the server.
The switch has the global MTU set to 1500
system mtu routing 1500
and I can't seem to set this at the interface level. The server is configured to send 1500 length frames. Why am I seeing these jumbos? (the server is Windows 2003)
I have a pair of Catalyst 3560 GB switches that are trunked with two of the standard ports, and that have trunk ports connecting to a failover pair of PIX 515e's. We're considering adding a pair of cluster database nodes and an iSCSI SAN, both of which would need a dedicated interconnect VLAN that I'd like to employ Jumbo frames on. I don't necessarily need the VLANs to traverse the firewall trunks since they're private interconnects, but I need each host to traverse the switch trunks.
Since it seems I can only enable Jumbo frames on the entire switch (current standard frame size is 1500 and jumbo is also 1500), when I enable it what kind of possible negative impact could this have on my trunked ports as well as my host connections? I've read mixed reviews of users with iSCSI SAN devices seeing terrible performance when enabling jumbo frames so I'm apprehensive about enabling them on an existing network.
The server team has asked me to implement jumbo frames on a single VLAN, the one they use for v motion. We have two pairs of 5548s, each pair running VPC for most connections. I am aware of many postings that describe how to enable jumbo frames globally, like this:
policy-map type network-qos jumbo
class type network-qos class-default
[code].....
I am not clear how I can extend this principle to one VLAN only.
Also, I am aware of a posting [URL], that shows some pitfalls of implementing jumbo frames in a VPC configuration. Pretty well all my connections are VPC, including all the FEXes, which are all dual-homed. In many cases, the VPC extends through to the servers so that the servers run port.channels across two FEXes. I am unclear whether the pitfalls are still valid, or whether I have to wait until my next maintenance slot (6 months away) to implement jumbo frames. Can jumbo frames be implement safely on the fly? How does enabling jumbo frames fit in with "conf sync" mode?
Region : Argentina
Model : TL-WR1043ND
Hardware Version : v1
Firmware Version :
Does WR1043D support jumbo frames?
I've enabled jumbo frames in Networking -> LAN (Local Network) -> Jumbo Frames on an RV180W running the base firmware (1.0.0.30).The switch seems to pass jumbo frames just fine (like ... almost every switch these days), but the router itself silently drops jumbo frames.ss this a known bug?This makes enabling jumbo frames on clients impossible, since it will break some external connectivity. (I.E. when two endpoints are on networks with jumbo frames, they will then negotiate a high MTU over the WAN, but the router will silently drop large frames and they won't get an ICMP Fragmentation Needed, etc. because the router simply drops large frames).
View 7 Replies View RelatedWe have a number of sites which have high-speed L2 links which terminate on our L3 switches at each site. The ports are between the sites are placed in routed mode.
I would like to use Jumbo frame between two of the network which will communicate across sites and 1500 mtu on the rest, is this something which is possible?
From my understanding is the mtu is set on the interface therefore if I set the mtu on the L2 link ports on both sites to 9000 then would this cause a problem for the 1500?
We are currently using two Nexus 5548UP's as our Datacenter Network Core. I have a pretty simple objective: I would like to enable Jumbo Frames on a single VLAN only(VLAN 65). This VLAN is used strictly for backups. I do not want to enable Jumbo Frames on the other VLANs(VLANs 1-10). Im not sure what the best way to do this is.....or if it is even possible but I am hoping to get some configuration examples.
View 7 Replies View RelatedI attempted to enable jumbo frames on a Nexus 5010 (NX-OS version 4.2(1)N1(1)). I created the policy map below and lost access to the switch.
policy-map type network-qos jumbo
class type network-qos class-default
mtu 9216
After recovery I see from the logs that all vlans and interface were suspended. I've attempted to look for reasons for a compatibility issue but I am unable to find what is checked and what could have been incompatible. The other troubling thing is the adjacent switch suspended its interfaces too but no change was done there. What I need to look out for so that this does not happen again?
2011 Nov 22 23:43:09 phx-ipcg1dwfcma %ETHPORT-3-IF_ERROR_VLANS_SUSPENDED: VLANs 1,10,601 on Interface port-channel1 are being suspen
ded. (Reason: QoSMgr Network QoS configuration incompatible)
2011 Nov 22 23:43:09 phx-ipcg1dwfcma %ETHPORT-5-IF_TRUNK_DOWN: Interface port-channel1, vlan 1,10,601 down
2011 Nov 22 23:43:09 phx-ipcg1dwfcma %ETHPORT-3-IF_ERROR_VLANS_SUSPENDED: VLANs 10 on Interface port-channel508 are being suspended.
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Can any ASA 5500 in particular the ASA5510 firewall support jumbo frames (i.e. greater than the default standard 1500 Bytes frames)?. I plan to use the ASAs to setup a point-to-point IPSec tunnel and need an Application frame of 4Kbytes intact and not segment it.I have done little checking on the Cisco Website and see it mention of Jumbo frames on the 5580 on 10Gig interface but didn't see mention 5510. 5580s are way over-kill and expensive for what I need is to run a mission critical one IPSec point-to-point with maximum of no more than 100Kbps so 5510 is perfect for me but not sure if it can carry the jumbo frame?
On the routers and switches it's the MTU settings and they are configurable per interface and I am OK and the circuit is T1 which the Telcos said it's OK since it's physical layer so the only unkown is the firewall.
I am trying to create a server in a game called Minecraft. I have forwarded port 25565 (which I put in the server settings for incoming connections and I checked that 10 times so that is ok) on my thomson TG787. I've opened the same port on my firewall in windows 7. I've disabled my firewall completely. But it's still blocked. It's simply doesn't work..I'm 100% I fixed it on the router.
View 21 Replies View RelatedI am trying to create a server in a game called Minecraft. I have forwarded port 25565 (which I put in the server settings for incoming connections and I checked that 10 times so that is ok) on my netgear wnd3700. I've opened the same port on my firewall in windows 7. I've disabled my firewall completely. Everything should be cool, but still, checking with canyouseeme.org and asking friends to join. It is still blocked. It simply doesn't work.. I checked my router for any firewall but couldnt see any.. So yeah I'm 100% I fixed it on the router, unless someone is gonna tell me that there is still an option in the router that might fix it.. but I think I did something wrong in the firewall..Although I have been trying to get this to work all day.. I'd rather get some advice on the firewall or other options in my router. Btw, I am using AVG free edition, and I am pretty sure there is no firewall in that version, but there might be something I have to disable in order for this to work ?
View 15 Replies View Relatedi have been trying to forward port 25565 for a server on a game called minecraft. I have a bt homehub 2 and i have followed everything on portforward.com and on several videos and still no luck. I have B.T net protect plus so I don't know if the firewall is blocking the port
View 1 Replies View RelatedI attached a really ugly picture of how the switches are connected. Basically, we have 4 VLANs in the company. Everything works fine on all VLANs, except the management VLAN (ID 1 - yeah, also the default VLAN ID, I know it's bad and it's going to change some day but...one step at a time). All the switches have their management interface on VLAN1.Here's what works and what doesn't work:If I connect my PC, on VLAN1, to switch number 5 (or any other one on the same row with it) or 4, I can ping 5 (and the entire row), 4 and 3. I cannot however ping 1 and 2If I connect my PC on VLAN1 to switch number 3 I can only ping 1,2 and 3.So basically from what I can gather, switch number 3 (D-Link) is not forwarding VLAN frames containing the tag 1 from and towards the trunk between it and switch number 4 (Cisco).What is strange is that this only happens on VLAN1, everything works perfectly on the others. And it stopped working when we installed the D-Link, we didn't have any problems when instead of the D-Link we had a 48-port netgear switch.
View 6 Replies View RelatedIn 802.11 and 802.11e.
1. PC
STA1 STA2 STA3
2. HC
STA1 STA2 STA3
The above are two scenarios
1. AP is configured as PC and consider one CBR application is present between 1 and 3.
2. AP is configured as HC and consider one CBR application is present between 1 and 3.
In scenario 1 if PC has polled to STA1 then STA1 will start sending packets to STA3.
Here my doubt is that the packets will go via PC(AP) or directly to STA3, If the packets are going via PC then what is the need of sending via PC. Because POLLING to STA1 means giving right to STA1 to send the packets.In scenario 2 if HC has send CF-poll to STA1 then STA1 will start sending packets to STA3.
Here my doubt is that the packets will go via HC(AP) or directly to STA3, If the packets are going via HC then what is the need of sending via PC. Because POLLING to STA1 means giving right to STA1 to send the packets.
I Get a mail From Someone which claims which says that they are forwarding a mail from someone How do i find out that the mail i have received s from that original person onlyBecause that person is not replying to me directlyHe forwards mail to a second person{assume} and that person forward me the mail::how do i find out that the mail i have got is really originated from that first person only
View 4 Replies View RelatedI have my 2Wire AT&T U-Verse router properly set up to forward the port 25565 from my machine. (Incidentally, PortForward.com gives me a blank page when I try to look up how to do this.) However, when I test the port is indeed open ( Open Port Check Tool - Test Port Forwarding on Your Router ), it returns as closed. Yes, I'm running the server software while I run the test. I only have the Windows Firewall, but I ran attempts while the firewall was completely disabled as well as with just the appropriate programs allowed.
View 9 Replies View Relatedsomeone at work sent me an e-mail they claim was forwarded. I don't think it was, and I need to know before I ask, because accusing someone of making it look forwarded, I viewed the source code, but I can't tell, it was sent through a microsoft exchange server.I think they copied and pasted and changed dates, is there anyway to tell from the source code?
View 2 Replies View Relatedi'm trying to use VNC as a remote desktop i was told to forward port 5900 in order to connect. but whatever i do i still an error saying that the port is not forwarded..Connection test failed.VNC Server appears to be behind a NAT router with IP address x.x.x.x. You will need to configure that router to forward port 5900 to this computer before you can connect to VNC Server over the Internet.as you can see here the port is forwarded to the server computers local IP.i have no firewalls active, and no anti-virus software that could be blocking VNC.
View 1 Replies View RelatedWe have a pair of CSS 11501,Currently it is using source ip for load balancing and 5 servers as backend , however we have users loggin in using http and based on its source IP (ISP PROXY) , it is forwarded to SERVER A.However, we have a SSL page and when the client switches over to SSL , it is forwarded to SERVER B/C/D/E based on its source IP ( REAL CLIENT IP) .This will cause the user to be terminated as the 5 servers are independent and not running in a cluster.
Is there any way that we can use the X-Forwarded-For address to load balance so that when users loging , they are sent to SERVER A (Based on X-Forwarded-For Header IP which translate to REAL CLIENT IP).This way we are able to also send it back to the same server when it uses SSL.I believe that we should be able to load balance using X-Forwarded-For IP or to rewrite the X-Forwarded-For IP into client source IP.
We have an ASA Version 8.0(5)19 as our firewall.We are trying an cloud service on the internet and found that the ASA is removing the X-Forwarded-For on the header on the surf traffic.Is it possible to not remove the X-Forwarded-For in ASA?
View 3 Replies View Relatedi have an ASA 5520 8.4(1) with following config
interface GigabitEthernet0/0
nameif WAN
security-level 0
ip address 216.52.185.33 255.255.255.240 standby 216.52.185.34
!
i need traffic (port 9350) from DMZ and WAN forwarded to object Production_23 port 3389, how do i achieve this ?
I have a client with a cisco 1841 router with a static public ip. He has 3 dvr's he wanted to acces from the internet and we opened the ports for the dvr's ip's. The issue were having is that only the first ip that we opened shows the port opened and works ok, the other 2 ip with their ports show closed.
View 17 Replies View Related