I have a switch where the current power threshold is set to -20.0db. The problem is that the receive power fluctuates between -19.9db to -20.1db, which is causing it to throw alarms on my solarwinds monitoring server. What I would like to do is change it to a different warning threshold, but I can't seem to find the command to do so. This is a catalyst 3750 running IOS version 12.2(55)SE3. [code]
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I've been having a debate with a colleague about QOS COS values. My colleague says I need to use COS values across layer 2 trunk links between access layer switches and core switches. My argument is if phones are marking packets with DSCP values I don't need to be concerned with Cos.The reason I ask is we're implementing a new phone system, the ip phones will mark RTP traffic wih dscp value EF and Call signaling with DSCP value of CS3. If my understanding is correct I can trust the dscp values of the phones. We are using Cisco 4507 switches which I believe automatically trust dscp values so I would just need a class-map to match the dscp values and apply the output policy map on the egress interfaces as follows? [code]
View 3 Replies View RelatedIs there a command to find your optical tx/rx power (dBm) on a 3845? On a 3750 you can do a show int transceiver; looking for a comparable command for ISRs.
View 2 Replies View RelatedI am working on a QoS design which I hope to test at some point, but at this stage its from the books.My question is how to decide which queue and threshold to use for video traffic, then lower priority traffic.I understand the shaping and sharing commands, its the queuing and threshold bit I'm not clear on.The plan is to use the priority-queue for EF marked voice, this will be policed on ingress to provide an upper limit to EF traffic levels, then my second priority traffic will be video. Which queue will get serviced first once the priority queue is empty, and how do I decide which threshold to allocate my video traffic to? The document ion is not at all clear, I want to prioritse my traffic in the following order:
1 voice, use the priority queue
2 video, this to get serviced ahead of data, after voice.
3 interactive data
4 Bulk data
5 Best effort
So Q1 settings are ignored due to priority queue. Q2 gets 70%, Q3 25% etc.Is it as simple as putting video into Q2 T1, then interactive data into Q2 T2, will Q2T1 get a higher priority over Q2 T2 once the PQ is serviced?
We have a scenario where we want to connect 14 access layer 2950 switches to Core switch 3750 via optical fiber in a LAN.What model of 3750 Switch should we use to tackle this situation.I have learnt that WS-C3750X-24P should support it.Isnt it?
Can we use optical fiber SFP module to connect 2950 switches to core switch?Does Cisco 2950 Switch support optical fiber sfp module?
What are the best values for "mac address-table aging-time" and "arp timeout" by following scenarios?:- single sg300-10 as layer3-switch with a maximum of 10 local (direct connected) hosts - and a 3750x-stack with 100 local hosts + hsrp with a other stack of the same sort or for asa 5520 as internet gateway for 500 clients?I use at the moment a mac aging-time from 300 seconds and a arp timeout from 3600 seconds.
View 6 Replies View RelatedI would like to deploy this kind of configuration (See attached network plan).My questions are:
1) is possible to enable etherchannel links between different switches, without stacking links?
2) how is the expected bandwith consumption when I enable etherchannel PAgP or LACP protocol?
Checking the logs we have seen the following messages:
%SPANTREE-3-PRESTD_NEIGH: pre-standard MST interaction not configured (Port-channel3). Please, configure: 'spanning-tree mst pre-standard' on ports connected to MST pre-standard switches.
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/1, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel3, changed state to down
%LINK-3-UPDOWN: Interface Port-channel3, changed state to down
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to down
%LINK-3-UPDOWN: Interface GigabitEthernet2/0/1, changed state to down
When this happened, the interface that was actually blocked by STP didn't come to forwarding state, and as a result this switch became isolated.This switch is connected to a switch that runs standard MST, and to some switches that run PVST but have bpdufilter enabled as we don't want them to participate on the STP. It is a 3750 switch with software version 12.2(55)SE5.
As far as I knew, when a MST pre-standard BPDU was received, the interface was able to receive more pre-standard BPDUs, but I didn't know it would turn the link down. Why the links went down, and if there is any way we can configure those links to accept only MST standard BPDUs.
I would also like to know if there is any chance a switch running PVST can send a MST pre-standard BPDU if it has a software version 12.2(25)SEE3.
How to find out which Fault Threshold group a specific interface belongs to.The scenario is that in Fault Manager there is an alarm for which I want to change the Threshold Setting.
Example Alarm:
Event_Description HighUtilization
Device IP x.x.x.x
Device Type Routers
Fault Last Updated At 19-Mar-2013 09:44:25
Component IF-router2.x.x/26 [Tu187] [x.x.x.x]
[Code] .....
I'm using RADIUS and FlexConnect APs. The issue is intermittently users will lose connectivity as if they're de-authenticated. Their clients still believe they're associated to wireless but they have no network connectivity. On Windows 7 we receive the exclamation point over the signal strength indicator.
There doesn’t seem to be any rhyme or reason as to what is causing this. It doesn’t seem to happen at any particular time intervals or anything else I can identify. Sometimes users will go entire days without experiencing connectivity issues sometimes they can’t go five minutes. When the clients are experiencing the issues they cannot even ping their default gateway.
The setup was initially the following:
Site A: 1142N APs and RADIUS server (server 2003) users are authenticating to.
Site B: Flex 7510 running code 7.0.116
Between site A and site B there is a site to site VPN with no restrictions.
After some time of working with TAC and not getting anywhere I setup the following:Site A: 4402 WLC running code 7.0.116 connected the same 1142N APs HREAP mode. I had the same issue with connectivity with that setup.Today I changed over to local mode and as of yet I haven’t had reports of connectivity issues.
When running ‘debug client MAC’ I see no indication of connectivity issues. I also have an NCS and I don’t see anything indicating what the issue is there as well. I’ve tried with both enabling and disabling ‘H-REAP Local Auth’. We seem to experience the issue in H-REAP standalone mode as well.
In WLC i see the roaming option to controller the handover. As the accompanying graph [URL], how do I up or down the threshold of the handover? or, How do I more sensitive to IP phone(NEC model MH240)?
I don't understand the four textfield of the roaming options URL
We're getting complaints about a specific 1131AG in the field only being intermittently accessible. WCS shows both the a and b/g interfaces randomly bouncing, sometimes the reason for the bounce is unknown other times it says it's because it lost connection to the controller. I can ssh into the WCS but the engineer who setup the AP's doesn't seem to have enabled remote access via telnet or ssh.
We are also seeing these events:
802.11a interface of AP * is down: Controller 172.17.0.10 Reason: Max retransmissions for the AP have reached.Interference threshold violation reported by '802.11b/g' interface of AP *, connected to Controller '172.17.0.10'.I know I can adjust the threshold percentage, but that would only seem to mask the issue.WCS gives this version info on the AP:
Versions
<DIV style="DISPLAY: block" id=versions mcestyle="display: block;">
Software Version
6.0.202.0
Boot Version
12.3.8.0
[code]....
On a Cisco ASA 8.4 code is it possible to receive an alert once a certain number of tcp/udp connections is reached? I'd like to see if I can get an email alert or syslog if the ASA reaches say 2,000 connections for example. Once I get an alert I could then investigate the cause of so many connections.
View 1 Replies View RelatedI need a WCS report that will actually give me the top n Wireless Access points that have too many clients trying to authenticte to them.We have some serious capacity issue in meeting rooms but we need a ball park figure of how many WAPs might be affected.
I know I can interogate the WCS to drill down and find out that WAPs are exceeding their threshold I just need to have a decent report generated.I have searched the reports from WCS 6.0.202.0 and cannot seem to find anything that suits.
I've read some opinions that lowering the RTS threshold can facilitate in some noisy wireless environments. I have found how this can be done on standalone APs but cant seem to implement the change on a WLC 2112. How to do it.
View 3 Replies View RelatedI've seen where the micron is printed on a fiber strand, and that you can identify the connector type, but how do identify the difference between a 50 micron OM4 MMF, a 50 micron OM3 MMF, and a 50 micron OM2 MMF?
View 7 Replies View RelatedI set the Cisco's AP settings with MTU size as 1200 bytes and the Fragmentation threshold to 256 bytes. Set up: I am using a WiFi enabled laptop connected to Cisco AP running an application pumping data of size 1400 bytes continuously to a Wireless node connected to the same Cisco AP over WiFi.
I am monitoring network activity on the same laptop using Wire shark.However,i cannot see 1400 bytes data getting fragmented. What is the concept of fragmentation and MTU size? Also,I would like to know how to change the AP settings so that i can see the data (1400 bytes)getting fragmented to small byte chunks.
following errors.
Nov 7 21:34:50: %EARL_NETFLOW-SP-STDBY-4-TCAM_THRLD: Netflow TCAM threshold exceeded, TCAM Utilization [99%]
Nov 7 21:44:44: %EARL_NETFLOW-SP-4-TCAM_THRLD: Netflow TCAM threshold exceeded, TCAM Utilization [91%]
I've already found this kinds of cases, in this community. So, It seems that Changing the current configuration to 'mls aging fast threshold ## time ## ' is most suitable in our situation.But, I don't know how to calculate the apt threshold value and time value.
[1] sh run | in mls
mls ip multicast flow-stat-timer 9
mls flow ip interface-full
no mls flow ipv6
no mls acl tcam share-global
mls cef error action freeze
[code]....
I have an RV042 (it's old, silver/dark grey plastic front one) w/ firmware 1.3.13.02-tm.
The reason we bought this (long ago) was to balance two WAN connections, one with unlimited data and one capped monthly. It did that once, but for a couple years both connections have been unmetered so it's just been balancing them 50/50. As of today one WAN connection (the new much faster one) is back to being metered but I can't figure out how to configure the RV042 as it once was to prefer sending traffic over the slow, unmetered connection first, and only use the faster metered connection when necessary.
It's been a long time and honestly I only vaguely remember the ability to prioritize a connection based on % of bandwidth used so that all traffic would go over the unlimited connection 1st until it was flooded, and only then fall over to the metered connection. This is totally different than the weighted round robin, or smart link backup.
I found this 3rdparty forum post that supports that vauge memory and suggests this was eliminated between firmware 1.23 and 1.3: [URL] Is it possible to replicate this functionality with the current firmware? if so how? If not, how to do roll back to firmware 1.23?
It sounded like perhaps I could assigned WAN1 a bandwidth of 100000 (even though it's really 1500) and then assign WAN2 a bandwidth of 1 (even though it's really 20000) and the result might be the prioritization I'm looking to achieve... but I feel like I'm stumbling in the dark at the point.
560km long pipeline, intermediate station at every 30 or 40 kms. Couple of Ip phones, 2 or 3 IP camera, and few control signls (IP system) will be connected at every stations. Do not expect heavy data. Which one may be the prefered economical solution can I use
1. Ethernet network (Switch with Optical SFP ports at every site)
2. SDH equipment at every site
3. DWDM equipment (if so lower end)
I have a ONT with a built in router but I need to install a separate router onto our network by connecting the router to the ONT. I need the extra router so that I could use some 3rd party hardware which can only be configured in D-link and Tp-link brand routers. I do not want to change the ONT system to the standard modem router system because the ONT also supports a system of internet phones. I'm curious if this is possible at all because a repair tech. told me that you could use the router as a transformer but so far it is not working. I'm really unfaimilar with the ONT configuration so I don't know if this plan can actually work . So far the router can not recieve a WAN connection and therefore can not obtain a Ip address.
View 2 Replies View RelatedI have a Laptop with no optical drive. I wanted to avoid buying and external CD/DVD Burner by connecting the Laptop to the Desktop in order to use the optical drive to setup up office and MSWindows
View 3 Replies View RelatedIn previous versions of LMS, I navigated to RME - Devices - Inline Edit to increase the snmp timeout. I haven't been able to locate the same process in LMS 4.2. Where I can locate this feature?
View 1 Replies View RelatedHave upgraded WCS to 7.0 due to a Mesh network feature we needed, but now see I can no longer edit the AP migration templates. The interface allows me to create or delete them but the command dropdown box does not show an Edit option. So now for every AP I want to migrate I need to create a new template before I can select the AP's and migrate them. I still need to migrate about 220 APs....
Looking though the function it tells me to click on the Migration Template name. However neither in MS IE nor Firefox this works, there is no link activated.
I whish to connect the two switches shown below.The distance between them is 50m (~54 yards), one floor apart, and I would like to link them with the cheapest optical solution possible.I have been given a solution with 19inch patch panel, splitter, pigtail cords, patch cords, SC connectors, i.e., the lot.Not being an expert in networking, I feel that is an overkill solution.
Servers______________________________________ Devices/Other Switches
| ___________________________________________________|
| ___________________________________________________|
V ___________________________________________________V
(SLM2048-EU-SFP port) <----------------------> (GBIC port-CISCO 2950 Series)
^
|
|
SAN
I was positively surprised to find the optical transmit/receive values using the show fiber-ports optical-transceiver detailed command on a SG300-10.
Now I'm wondering if there is also a SNMP-MIB to query these values? I've already tried the CISCO-ENTITY-SENSOR-MIB used by the larger devices running Cisco IOS, but this didn't work.
I have two SG300-20 Switches and buy two MGBLX1 Modules for the Switches.
I plugedin the Modules but the Modules didn`t work and in the WebConsole i can´t see the Modules.
Is there any configuration to enable the SFP Modules? or is it a problem from my Switches
We're installing ASR1000 series (ASR1001 and ASR1006) routers on a new WAN and have a requirement to enrypt the traffic between the EIGRP neighbors. Each ASR will be connected to the MOE with a gig interface and we will be using L3 on the interfaces with EIGRP as the routing protocol. We have advipservices-k9 IOS-XE
The ASR1006 is our datacenter WAN router and all remote sites have the ASR1001s. The ASR1006 WAN interface will be configured with L3 subinterfaces, one to each remote location, using a /30 mask.
What is the best method to encrypt the traffic between the ASR1006 WAN interface and the remote ASR1001 WAN interface?
One of my clients is using Cisco catalyst 2955 industrial switch.I am doing the configuration for them and come across one setting of FCS Error Hysterasis Threshold. I know FCS is Frame Check Sequence.
I do not understand is what is the meaning the setting of Hysteresis in term of percentage stand for what purpose?For example, the default is 10 percent. If I set the value to be lower 5% and what is the impact on that? Is this more stringent than default of 10% or less stringent than default of 10%?
Is there a device, which is able to produce a time delay on fiber optical link? I mean for example if one would like to reduce the power level of an optical signal, he could use simple air-gap optical attenuator on optical link. However, has somebody seen a device, which is able to introduce a time delay on optical link?
View 6 Replies View Relatedchoose the right media converter for my private LAN? My budget is very less & I found TP-Link products fits in my budget.I got confused by looking at 2 models & don't know which one to choose. TP-Link's MC220L and MC210CS. these two models are same but with different I/O Ports(connectors) for Fiber Cable connection?
View 4 Replies View RelatedI was wondering why there are so many different types of optical connectors? - sc, fc, lc, e2000? Why the devices have different connectors? Dispite the fact that some of them are push/pull, and some of them are not, and if there are specific types for multimode and singlemode, and full/half duplex.
View 5 Replies View RelatedWe are deploying over 20 RV180W Routers for a client and need to find a faster way to configure them for shipping.We have created a base image (all settings that will be shared between the 20 locations), we need an easy and quick way to make IP changes for the 3 VLANs and Local Security Groups for the IPSEC VPN.I tried to edit the CFG file by hand, but the checksum fails when it is loaded into the RV180W.How can I accomplish this? Can I manually create the checksum?Can I remove the checksum?
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