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- About mlund
08-15-2019
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Member since
07-18-2002
354
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353
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60
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Created by
mlund
in Server Networking
in Server Networking
08-14-2019
09:42 AM
08-14-2019
09:42 AM
Hi In cisco, native vlan means that the native vlan is untagged, and also by default this is vlan1, and this is per interface, so you can have different native vlans on different interfaces. If you change the native vlan from 1 to 30, means that on this interface vlan 30 is now untagged, and that will not match your VM. For your new switch if you are doing a trunk port between them the native vlan should be the same, otherwise you got the mismatch. If you are connecting two switches together with ports in access-mode, then you will get mismatch if the ports are on different vlans. There may be situations where you are forced to have different native vlans, and in that case you can disable cdp on the interface, because it is the cdp protocol that warns about the native mismatch. There are also a possibility to force the switch to tag the native vlan, but that is a global command, so it will take effect for all ports on the switch. /Mikael
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08-09-2019
01:34 AM
Yes, that is the recomendation. But it all depends on the packet size mix and what services that is used, se for example table 6. That test shows a throughput of 75Mbps
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08-08-2019
06:05 AM
Hi I found this. It will provide You with more information. http://www.anticisco.ru/pubs/ISR_G2_Perfomance.pdf /Mikael
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06-14-2019
05:46 AM
Hi From the link that OMZ provided, this is the difference "Any excess traffic is sent if the link is not congested or is dropped if the link is congested" That means that from Your second example You are guaranteed 20M, but if there are unused bandwidth, You can send more traffic that is classified as priority. So if there are no other traffic than the priority You can get 100% of the bandwidth. The first example means all traffic that is classified as priority is always prioritized, but as soon as the bandwidth goes above 20M it will be policed, and You can't get more, even if there are no other traffic. Mikael
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05-29-2019
03:29 AM
Hi From Seb:s example that we can use it but without reload. Do the tftp of the running config to the tftpserver. Edit the file, don't touch anything else but the example, vlan 3 interface g1/0/1 switchport trunk allowed vlan add 3 interface vlan 2 no ip address interface vlan 3 ip address 1.2.3.4 255.255.255.0 no shut Now upload the file with tftp to the startup Now you can do this trick, configure the router, but not with conf term, instead use configure mem then the router starts to configure using the startup config, and it reads the file from the start down to the end, executing every command int the startup, and if everything is as it was before all commands will just be the same, except for the changes You have done from the example. Beware of the fact that you have to have the "no ip address" on the old interface before adding th the address in the new interface. /Mikael
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05-13-2019
11:42 PM
Hi Reza has explained it well, just to try to explain further. It is still 2 physical boxes, however they are treated as if they where one box. So if you configure 1/0/1 as a routed interface with 192.168.1.1 as the example from Reza, and 2/0/1 with 192.168.2.1, you also configure the routes as Reza mentioned. Then if all is good both interfaces are alive and the route to 192.168.1.2 is then one in routingtable. If then switch one dies, then interface 1/0/1 is not available anymore so the routing will put in the the route to 192.168.2.2 instead. Then when switch one is back in business, and the 1/0/1 is up again, the original route will be inserted. /Mikael
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05-13-2019
11:32 PM
05-13-2019
11:18 PM
Hi You are missing the rewrite command, it will not work without it. /Mikael
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Created by
mlund
in Other Network Architecture Subjects
in Other Network Architecture Subjects
05-09-2019
05:08 AM
05-09-2019
05:08 AM
Hi From top of my head (it's fifteen years, or twenty, since i worked with isdn), no, you can't connect the isdn back-to-back, or direct to telephone line. Unless the lines are actually isdn lines. Isdn to work needs a magic box in the middle that handles the isdn call setup and numbercoding, and I'm not aware of any cisco equipment that can simulate that. Maybe some other old man on the forum has a better memory than mine. /Mikael
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05-09-2019
04:42 AM
Hi As long as the L2 mtu is higher than the L3 mtu, there will be no issues regarding OSPF establishment. /Mikael
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05-09-2019
03:54 AM
Hi Pat Yes, you can bundle them together with a port-channel, or you can use them as separated routed links and using ECM. As for shaping on a port-channel I haven't done it, but I suppose it should work. If not, use as many links that equals with the bandwidth to the provider, example if you have 4 gig to the provider, then use 4 links. /Mikael
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05-01-2019
11:16 PM
Yes, It seems pretty shure that it is the actual Vm that is facing problem. But, I saw You have a service-policy input and output on the interface, to be sure, can You examine what that service-policy is actually doing, there might be a small chans that it is this policy that is restricting traffic. /Mikael
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Created by
mlund
in Other Network Architecture Subjects
in Other Network Architecture Subjects
04-30-2019
06:50 AM
04-30-2019
06:50 AM
Hi This is because the signal received is too week. The reason can be that the cables are not clean enogh, try to disconnect all cables and clean them properly. The cables can be too long for the sfp that is used, try to change sfp to a stronger one. There is limitation on how far a certain type of sfp can send light without degredation. The cables can be damaged, try other cables. The cables can be of wrong type, verify what cables should be used with the sfp that is used. There are 4 major type of cables, 2 single-mode 7/125 and 10/125 and 2 multi-mode 50/125 65/125 /Mikael
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04-29-2019
11:45 PM
Hi when pinging from B to A:s gw you actually get the full path, but not the physical interface where A is connected, and as this is going fine, I would suggest to look closer on the path from A (including A) through switches (if thera are any) and the physical interface of A gateway. Is there any errors or are there any configuration that maybe is restriction traffic. Some mls ratelimiting or a policy-map maybe. For other tests you can use nping for example, it can sen traffic with udp or tcp, download it from nmap. /Mikael
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04-25-2019
11:40 PM
Hi Can You try with some other test, that is tcp or udp based. It can be some restriction in the path for icmp packets. /Mikael
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Created by
mlund
in Server Networking
08-14-2019
08-14-2019
HiIn cisco, native vlan means that the native vlan is untagged, and also
by default this is vlan1, a...
08-09-2019
Yes, that is the recomendation. But it all depends on the packet size
mix and what services that is ...
08-08-2019
HiI found this. It will provide You with more
information.http://www.anticisco.ru/pubs/ISR_G2_Perfom...
06-14-2019
HiFrom the link that OMZ provided, this is the difference "Any excess
traffic is sent if the link is...
05-29-2019
HiFrom Seb:s example that we can use it but without reload.Do the tftp
of the running config to the ...
05-13-2019
HiReza has explained it well, just to try to explain further. It is
still 2 physical boxes, however ...
05-09-2019
HiFrom top of my head (it's fifteen years, or twenty, since i worked
with isdn), no, you can't conne...
05-09-2019
HiAs long as the L2 mtu is higher than the L3 mtu, there will be no
issues regarding OSPF establishm...
05-09-2019
Hi PatYes, you can bundle them together with a port-channel, or you can
use them as separated routed...
Created by
mlund
in Other Network Architecture Subjects
04-30-2019
04-30-2019
HiThis is because the signal received is too week.The reason can be that
the cables are not clean en...
Public Statistics
| Date Registered | 07-18-2002 05:26 AM |
| Date Last Visited | 08-15-2019 11:36 PM |
| Total Messages Posted | 354 |
| Total Helpful Votes Received | 353 |
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