When we configure a SG 300-10 switch in layer 3 mode to do so some static routing, I would like to know the ARP table limit (association between IP address and MAC address) ? The documention talks about MAC (association between MAC and port) table limit, routing entries limit ... what about ARP limit ?
View 1 RepliesI'm setting up an SNMP poller to retrieve the ARP table (ipNetToMediaPhysAddress) from my SF300 switches. I can retrieve the table from SF300-24P and SF300-48P switches running Firmware Version 1.0.0.27, but get garbage for the MAC address when retrieving that same table on the same model switches running Firmware Version 1.1.1.8. Is there an outstanding defect on this code level? How can I retrieve the table showing the IP address to MAC address mappings?
View 1 Replies View RelatedThis is a bit of an odd question because it's about a problem I ran into a year or so ago, but I wasn't aware of these forums at the time, so I thought I'd run it past you all. Unfortunately that means I can't reproduce the problem right now, so it's kind of a theoretical question.
A while ago I tried to deploy an sg300-28 in L3 mode as the "core" switch in our ~70-person office, with static routes across 5 vlans. There were probably around 250 devices on the network in total when you include phones, virtual machines, mobile devices, and so on. Over the deployment weekend things worked fantastic; when everyone came in on Monday, network performance was terribly slow.
So my theory at the time was that the switch's (L3) arp cache was full -- if I pinged a host on another vlan, the switch would send a new ARP request every second ping. We scrambled a Linux box to act as a router and disabled the L3 functionality on the switch, and it's been fine since. However, in the months since then, we've observed some STP misconfigurations, which leads me to wonder if it wasn't an ARP table size issue, but rather a topology issue. But moving routing to a different box did solve the problem immediately.
The switch has been fine as our core switch. The MAC table on that switch right now has 358 entries (we've grown since this happened). It was just on level 3 that it wasn't keeping up.
Does this ring a bell? How many arp table entries can an sg300-28 retain?
In datasheet of WS-SUP720-3B - link- was said that are only supported around 256K routes (fib?rib?).With this value I can't get 2 full bgp - that is around 850K ..
The supervisor is that control this or just memory ? I said this because I have a 7204-npe-g1 whith 2 fullrouting and 1G of and he are ok..
I volunteer at a school who just purchased two 48 port SGE2010 managed switches. I am not a big fan of the web gui and was hoping to see the standard Cisco command prompt instead of the menu-type interface.
Is there a way to view the MAC table showing which MAC address is plugged into which port on the switch? I have been fighting with the menu and the gui for a while now and do not see this anywhere.
I am little confused about the location of FIB table and adjacency table in both cisco 6500 series and fixed ports switches .In case of 6500 series switches
"Central CEF mode:The CEF FIB and adjacency tables reside on the route processor,and the route processor performs the express forwarding. Use this CEF mode when line cards are not available for CEF switching, or when features are not compatible with distributed CEF."
If line cards do no support CEF, then FIB and adjacency tables are built and are located on route processor( control plane ). Data plane operations are implemented in software and route processor performs those operations.
Some Cisco switches actually use different hardware to control the different planes. For example, the Cisco Catalyst 6500 is a modular switch that uses the Multilayer Switch.Feature Card (MSFC) for control-plane operations, and the supervisor Policy Feature Card (PFC) for the data-plane operations.
Supervisor module has has MSFC and PFC. MSFC implements control plane operation where as PFC implements data plane operation.But the first paragraph says in Central cef mode, both data plane and control plane operations are implemented by route processor. [code]
Do these switches implement the Central mode cef in same way as mentioned above. i.e
"Central CEF mode:The CEF FIB and adjacency tables reside on the route processor and the route processor performs the express forwarding. Use this CEF mode whenline cards are not available for CEF switching, or when features are not compatible with distributed CEF."Or fixed ports switches such as 3750 implement data plane operation in hardware where FIB tabe and adjacency table are maintained on Data plane.
I have been told there is a limit (8) on the number of source ports that can be mirrored to a given destination port. I can find no specifications or other documentation to corroborate this claim. Any factual data to confirm or refute this claim?
View 7 Replies View RelatedNever seen a Cisco, or any other L3 switch before. Nor an Lx router. Any step by step,or class room or web based training, or a partner or Cisco helper to get us up to speed on this.Goal is to limit http and https traffic in favor of telnet to an AIX server and RDP to a Windows TS. Printing would be ahead of http/s and below the others.
Interstingly, the web site promises 9 videos, but there are only 8. The demo guide says about OoS: "Coming Soon".Where to go? Who(m) to call?
how to limit the bandwidth in digicom router?
View 2 Replies View RelatedI have a Cisco SG300 small business switch and 541 APs. There are 2 VLANs in our network. One must be limited by bandwidth. How to configure vlan rate-limiting on SG300? And describe CIR & CBS.
View 1 Replies View RelatedRecently our company purchased 3 Lynksys SGE2010p, At the moment they work as a stack but as we are implementing UCCX we need to mirror 15 ports but during the provisioning i've noticed that the limit is 8 ports per stack. I'm wondering whether this is a known issue or just a known limitation . I believe that most probably i'll need to move back to stand alone mode so i could configure 8 mirrored ports per switch.
View 2 Replies View RelatedOur network administrator restricts all our new 1Gb switches to only 100Mb, to which he claims it will increase overall performance. Preventing devices from bottlenecking the network. (that is, only restricting the main switch ports, not the uplinks)For example we have a new building with 2x WS-C2960S-48TS-L connected together with FlexJack and then a 1Gb Fiber connection back to our core switch.
This building is on it's own subnet and there is little broadcast traffic. I don't see the point other than it hinders the potential speed we could use. Labs are set up in this building and 1Gb is MUCH faster when it comes to imaging and software deployment.
Is it possible to enable an absolute value rate limit using QOS on a HP ProCurve 5406 switch for a particular IP range on a specific port? Is there a way to configure our HP 5406 with an absolute rate limit on "WAN" port for that server's IP range? I would like to limit it to only being capable of sending 1Mbps worth of traffic over the head end at once.Everything in the documentation points towards priority queues, which as far as I can tell, isn't really what I want.Baring accomplishing this goal using rate limiting is there a better way to prevent our services from accidentally saturating this connection?i thimkong about somthing like that:
class ipv4 rate-limit-port-A1
match ip 10.136.0.0/16 any
exit
policy qos port-a1-ratelimit
class servers-to-be-slowed action rate-limit kbps 1000
exit
interface A1 service-policy port-a1-ratelimit inI'm not sure about this.
I am planning to buy a router for my hotel and I would like to know is it possible to limit the bandwidth limit to the guests? And the admin computer can utilize the maximum speed? it it possible to create a login page paper when some one enters my wifi connection?
View 7 Replies View Relatedneed to know the OSPF best design. I have a customer currently running their OSPF only in two area. Area 0 is provider reside and area 1 reside 700 hundred over of router including HQ router and remote branch router connecting to metro-E 10Mbps networks. Is this design have any weakness? Area 1 about 800 hundred router reside in, the HQ model is cisco router 7200 and remote end is cisco router 1841.Let's say they want a solution, for 3G remote router connect back to the HQ using Lease line with a fixed IP. Using DMVPN and OSPF communicating back to HQ. What should we aware when designing and implementing for the OSPF best practice. They have 700 hundred over remote branch need to terminate back to their HQ. I read cisco recommend an area should not be more than 50 router and per-area no more than 28 area.
View 4 Replies View RelatedCan someone throw me a bone on what might be occurring here?
View 7 Replies View RelatedWe have a BGP / OSPF configuration as shown in the topology picture. When the connection towards Internet is taken down, we expect the traffic to be forwarded toward WAN 2 (preferred) or WAN 1. The problem is that the BGP learned routes disappears when the Internet connection is taken down. The IP routing table on R2 only shows internal networks and the networks between R2 and WAN 1 and 2. No routes to internet is shown. We run "show ip bgp neighbors <ip-to-wan-1-router> received-routes" it contain internet routes. And when we run "show ip bgp neighbors <ip-to-wan-1-router> routes" it contains no routes at all.
View 2 Replies View RelatedTrying to get a Cisco ASA 5505 to show me all the current dynamic PAT. (I don't want to see hard-coded port forwarding, just dynamic stuff the router is doing to allow various hosts on the network to talk to the WAN.)
View 8 Replies View RelatedAny good link to find how to configure MAB table on acs 5.3? I cannot find one by myself. If it is possible a guide with picture in it.
View 7 Replies View RelatedMy comany is planning get full bgp table from our providers we have mutliple egress providers in order to load balance we are looking for a full table from all of them what would be minumu requiremts we have all edges as 6500 with sup 720 ,is there any memory requrements that need to be upgraded ??
View 4 Replies View RelatedWhere can the following information be found?
1. CEF table capacity (maximum)
2. Route table capacity (maximum)
I can issue "show ip cef sum", "show ip route sum" to see the current usage.
I've inherited a project building an internet connectivity solution for a large corporate. It has its own AS and its own PI space. They are putting in 100Mbit connections from 5 different Tier1's , taking full internet routing from each. Cisco ASR1002's have already been specified and purchased for the job. I'm not familiar with the ASR platform at all - is it up to the job with full routing tables? multiple instances of full tables ? (not likely to put all 5 into one box!)
View 2 Replies View RelatedI have this routing table which I need to fill in for the network shown in the image attached. guide me to some good resources to understand
View 1 Replies View RelatedThe problem is the memory available in common BGP-routers. A sup720-3BXL for example, a widly used sup-engine for handling BGP as far as I know, is getting to the limit of its memory size, depending on the number of upstream-providers connected to it.What are you doing, what are major ISPs doing, to circumvent this problem? setting up some server, working as route-reflector, and with a high level of summarizing routes, above supernetting? But at the cost of stability? Or buying new hardware, supporting bigger table? For example the RSP720-3CXL-10GE with up to 4GB memory? But how long will it last? Or a ASR-9001 with 8GB memory or even the ASR9k6 + RSP440 with 12GB mem?
View 19 Replies View Relatedviewtopic.php?f=33&t=24000
How can you remove these "L" routes in routing table?
I have an RV082 10/100 8-Port VPN Router and have configured the NAT table to allow for remote users, however I've run into an issue. It seems like there is a limited number of entries that you can put in the table,10, and I need to configure about 5 more IPs. Any way to expand the NAT table, or alternatively recommend a different router. I would also be willing to add another router to the network, but I have little experience doing that.
View 3 Replies View RelatedI am looking how to see the mac table on a Nexus 5000 switch running NX-OS and confirm the mac address on a certain port. Similar to the Sh mac-address-table in IOS and sh cam in Cat-os.
I am sure this is simple I just cannot find the command.
how I can get to the DHCP client table on a Cisco 891 Router ? We just upgraded our router from a WRVS4400N to the Cisco 891. THe WRVS4400N has the feature DHCP client table that I can see the Client host Name and IP address,Mac Address I have CCP and CCP express installed on my system?
View 1 Replies View RelatedWhat are the rough figures that a NPE-G2 is able to hold for the BGP routing table?
378475 network entries using 51472600 bytes of memory 378482 path entries using 21194992 bytes of memory 63008/63003 BGP path/bestpath attribute entries using 8065024 bytes of memory BGP using 82975730 total bytes of memory
Are these 3 memories different memory allocated or are they are a sub-set of each other? If a NPE-G2 has 1GB RAM, does it mean that the routing table limit is depending on the RAM availability?
trying to fetch the equivalent of the mac-address-table on a 1811 with SNMP. I want a mapping between active MACs to a port ifIndex (not a VLAN interface ifIndex).
- I've snmpwalked every MIBs on this device (including all the proprietary MIBs supported by the IOS)
- I've upgraded to latest IOS from the 12.4(24)T series and also tried latest from 12.4(15)T series
- I am aware of the community index (@ sign in read-only community to split per vlan)
- I've exhausted all my google skills
On 29xx, 35xx, we obtain that information using the BRIDGE-MIB, community indexing and the following OID:
1.3.6.1.2.1.17.4.3.1.2 (dot1dTpFdbPort)
ex:
# snmpwalk -v 2c -c public@1 192.168.1.61 1.3.6.1.2.1.17.4.3.1.2
SNMPv2-SMI::mib-2.17.4.3.1.2.0.23.89.208.164.62 = INTEGER: 24
SNMPv2-SMI::mib-2.17.4.3.1.2.0.23.101.255.67.177 = INTEGER: 12
SNMPv2-SMI::mib-2.17.4.3.1.2.0.24.25.113.78.52 = INTEGER: 11
We have a couple of 6500 series switches and have 3 BGP peerings to each. The 6500 series switches are loaded with WS-SUP720-3B Supervisor Engine. I believe there is a limit to the number of IPv4 routes WS-SUP720-3B supports(256,000). We also have "soft-reconfiguration inbound" configured on the BGP peerings. Thus when I do a "show ip bgp A.B.C.D" it displays three routes from 3 BGP peers and it displays an additional 3 "received-only routes" which I think is due to the "soft-reconfiguration inbound" configuration. We currently filter inbound routes from the BGP peers to be between /0 and /27
We are now looking to add another 2 BGP peerings. I am not too sure if the WS-SUP720-3B will be able to handle all the BGP routes. Is this limit of 256,000 IPv4 routes due to Processor memory limitation or is it software related? Would removing the "soft-reconfiguration inbound" save me some memory ?
We are running with Cisco ACS v4.0 AAA server, Here I need the use of Proxy distribution table.
View 5 Replies View RelatedWe have an issue in which some of our public IPs will not work from outside. We have a couple of subnets/29. We allow traffic via access rules and they point to internal servers (nat to nat). So I requested an ARP table from our ISP router. The table shows that the non working IPs have a differect MAC address than the working IPs. Our ISP blames our equipment (CIsco ASA 5510) for this. I spoke to Cisco support. They looked at our configuration, and tested it. They say our configuration is correct and the ISP's equipment is doing it.
IPSMAC address*.*.*.5*.*.4cd8*.*.*.4*.*.4cd8*.*.*.3*.*.4cd8*.*.*.2.*.*.4cd8*.*.*.204*.*.4cd8*.*.*.205*.*.4cd9
As you can see above, the IP ending in 205 has a different MAC address ending in 4cd9. It should end in 4cd8. This seems to happened randomly with all IPs. Like if I restart the ASA. Some of the IPs will not work, and will show a different MAC address.We then have to wait a couple of hrs for them to start work again.