Cisco Switching/Routing :: 3560 - HSRP Setup / S2 Active And Route Traffic From Internet To Client?
Jan 14, 2012
i have a strange issue with an HSRP Setup. I have two (S1+S2) 3560 as Core/Distribution Layer. Inter-vlan routing are enabled on both Switches. S1 and S2 are connected with an ether channel over four fibre ports. S3 -S5 are the (L2) access layer.
Gi0/1 on S1 and S2 are L3 ports, connect to a Linux Firewall.
HSRP is enabled, S1 is the active router and the STP root bridge.
But, my monitoring via cacti show me, that the Gi0/1 on S2 is active, too! But it should not be active? Only if S1 fails, should S2 the active switch.A client from the access ports on S3 - 5 gets traffic from the Internet via Gi0/1 from S2. Gi0/1 on S1 is active too, but will send mostly traffic to the Internet. Why is S2 active and why route it traffic from the Internet to the client?
I am running HSRP on three 4506 switches..S1(active) S2( standby) and S3(listen)..S1 is active for all the vlansRight now, I wanted to make S3 active for two vlans: vlan 10 and 19What would be the impact to the end hosts?Also, can you tell me why the arp is not syncing for all the three devices? [code]
I am working on two Nexus 7010 with 5.1.5 NX-OS version. I configure HSRP traditionnaly, Nexus 1 with a priority of 200 and Nexus 2 with a priority of 100 for all vlan.
When I change the priority of a vlan to 200 to 50 for example, Nexus 2 become active and Nexus 1 standby. The problem is that when I do a traceroute from a PC the packet take the Nexus 1 as defaut gateway all the time.....
For information I have a peer link between the 2 Nexus for vPC.
Is there a loop between 192.168.99.191 and .192 (this are two routers with hsrp .190) or is this normal behavior when using trace route on an asr 1001?
At one of my field offices I want to redirect internet traffic down a separate DSL connection instead of having it ride the T1 back to the main office then going out. At this office I have a 2600 router, 3560 switch, with a Fortigate firewall in between DSL connection and LAN, Fa0/0 on router and firewall are both plugged in to switch. I have seen posts that mention PBR or static routes which is the reccomended method for dealing with this?
Normally when we do HSRP with vPC on N7K the device will be Active/Standby in control plane but it will be Active/Active in data plane. In this case any traffic reach to standby device it can forward traffic directly to uplink which is not my desire. My goal is all traffic should pass through active (control plane) device in every case unless active device totally dead. So Is it possible for Nexus 7000 to be HSRP Active/Standby in Data Plane ?
I understand on older IOS codes If the same hsrp group number is assigned to multiple standby groups, it creates a non-unique MAC address. Is this true on newer codes like 12.2(52)SE for 3750 & 3560?
1 x 4500 and 1 x 3560?They are gateways of 8 Vlans?They are doing HSRP in each of those Vlans?The 4500 is the Active?There is a DHCP Pool for each of those Vlans on both gateways using "ip dhcp excluded-address" I ensured that the range of provided ips by each DHCP server will not be overlapped Obs.: Reducing the lease time, I ended with the calls bringing related problems.
OK, every thing is blue, every thing is fine.But the network diagram is realy complex(41 switchs, 89 uplinks), and depending of how is the network flow, one or other server answer first or latter.
For many reasons I would like that the secondary DHCP server would answer only if the primary DHCP server goes down.To me, the bigger reason is that DHCP database would be only in one DHCP server.But there is other reasons.
I passed by many frustrated solutions:Try to force a delay on the answer on one of the servers. - Impossible.Try to disable DHCP server, and, using EEM, enable it only if router became active in HSRP. - I couldn't do It.
What I'm thinking now is use the HSRP resource to resolve it.On both routers I would put a "ip helper-address" pointing to an Virtual_HSRP_IP.And depending on which router is the active, him will answer the request.
My first doubt is:Would it work?The second doubt is:Could I use the same Virtual_HSRP_IP that exists on that Vlan(see example 1),or I would need to point it to a Virtual_HSRP_IP in a different Vlan(see example 2)?
Example 1 ----------------------------------- | 4500 | ----------------------------------- interface Vlan1 ip address 10.10.0.2 255.255.0.0 ip helper-address 10.10.0.1 standby 1 ip 10.10.0.1
A check out a network segment and want to know why SwA has a static route to SwB if SwA already has a Default GW to Core?
(SwA, SwB - Catalyst3560, Core - Catalyst4948)Note, there are distribute list on SwA - it does not has any OSPF route (exclude O*IA).
Does this mean when SwA send out packet with DA 10.5.64.0/26, Core will use only L2 switching (instead of L3)? Is this more effectively for Core Switch?
Pleace check my reasoning: 1. When use a static route: SwA receive packet from Vlan 20 with DA 10.5.64.0/26 it will strip out Dest. MAC and replace it with MAC of SwB. Core will switch this packet to SwB based on mac add. table (l2 switching)
2. When SwA has only Default gateway and receive packet from Vlan20 with DA 10.5.64.0/26 it replace Dest. MAC with Core MAC. Core receive this packet, lookup route table for 10.5.64.0 entry and forward packet base on this.
I have an ASa 5510 and setup remote dial in users.
I wanted to use the windows 7 built in client and also the draytek site to site VPN options however when they connect VPN traffic will not work however when i use the cisco VPN client then everything works fine.
All the VPN's connect pretty quickly.In the syslog I a getting errors when i try and ping something: [code]
I have catalyst 6500s with two VS-S720-10Gs, one is in Active and one is in Hot state. Both Sup cards have two 10G uplink ports. How does the traffic forwarding works in this case on the uplink ports? Do these uplink ports actively forward traffic or it is only the uplinks ports on Active that forward traffic? I see CDP neighbors on both Active and Hot SUPs uplinks ports - it indicates that packets are flowing on both cards.
I want all uplink ports on both SUPs to actively forward traffic. Does it work? What is the config for this?
We have a Cisco 3640 router running c3640-is-mz.123-3g.bin Switching ports are devided into several VLans. Each VLan has its own IP subnet. We can't ping IP address X in subnet A from subnet B unless we log into the router and ping it from there first. (and then the IP address will show up in "show ip arp" command. Then we can ping X in subnet A from subnet B, and browse web on device X from subnet B, etc. )
I'm performing tests with following desired scenario: We have several remote offices, connected to our HQ via MPLS. In these remote offices, we have several vlan's. Each vlan has it's own ip-range. The MPLS cloud is routed, so we cannot switch our HQ vlan's to the remote offices. In this case, the client pc is in a guest vlan which allows him internet access. The uplink for this internet access is hosted in our HQ datacenter.
basic scheme: client pc --> MPLS cloud (managed by ISP) --> 6500 switch LAN --> Checkpoint Firewall --> 6500 switch DMZ --> ASA Firewall
My test scheme: Client pc is in a subnet A (guest vlan range office). We receive this traffic on our first LAN 6500.
I am using Cisco 3560 as distrubution switch and want to limit port 445 traffic on 1 MB and applied rate limit statment on Gi0/1 port but switch unable to limit said traffic.rate-limit output access-group 120 1024000 128000 128000 conform-action transmit exceed-action drop.
We are moving a small network of 3560 and 3750X switches from VTP Server and Client to VTP Transparent. I noticed the vlan database is stored differently depending on the VTP mode.
Is there any chance of losing vlan database on a given switch when moving from Server or Client to Transparent?
Actually i have a design from my customer who have ( Cisco core switch 3750 (allports fiber ports) which is connected to L2 switches , these switches carry servers and end users .the only routing protocol on the access switches is static route ,
My question how can i route the traffic from the server to the end user , as the the server is not direct connect to the core switch.
I have a 3560 switch where I have 4 ports connected, one is to our WAN provider - 10Mbps and the other three are connected to different customers who I want to get an equal share of the 10Mbps bandwidth.I'm fairly clued up about configuring modular QoS but I'm being thrown by the fact that you can't apply a service-policy outbound on the ethernet ports.
i am not sure if this is something with my DHCP setup or not, but it certainly seems to be the culprit. I am running a 3560G and using it as DHCP and to do V LAN routing (Geiger protocol). I have 10 pools configured with a few static addresses per pool. Now to get down to the problem. I have a computer (and this problem seems to be a gremlin as it changes what computer is affected quite often) that will connect, get its IP, immediately disconnect, then send out a DHCP req again. The computer has a static assignment in the pool, and for the brief second that it connects, it gets the right address. If i move the computer to another v lan, all works right. If i delete the static entry it will get an address in the right v lan no problem. The command i have been using to add static entries is:
That seems to have been working on all my static routes except for a bank of computers in vlan3. I have went as far as to delete the pool and recreate it, heck i even recreated the v lan and i am still having issues. Below are some snippets of the running config for review.
The DHCP Pool for the affected LAN: ip dhcp pool Dev3 network 192.168.3.0 255.255.255.0 boot file bootx86wdsnbp.com next-server 192.168.1.78 dns- server 192.168.1.8 192.168.1.78 [Code] .....
How do I limit broadcast/mulitcast traffic on a switchport to e.g. 5000 pps ? I don't want the port to shut down, just block or drop broadcast traffic that exceeds 5000 pps.
We are in the process of rolling out iPads to our offices. As part of this implementation, we need to print from the iPads to our network printers. Our network printers are mostly HP and Xerox and do not have native Apple AirPrint capabilities. As such, we have been using the FingerPrint software to share out the network printers as Apple AirPrint printers. We have a mixture of switches at our offices. Most offices utilize a 3550 PoE switch. In these offices the AirPrint traffic is being transferred successfully and everything works great. In the offices which are using 3560 PoE switches, the traffic is never seen at the iPads. We are using EnGenius EAP300 access points connected into the Cisco switches to provide wireless access to the iPads. Both 3550 and 3560 switches are running iOS 12.2(25). What might be stopping/blocking the AirPrint traffic on the 3560 switches?
I use WS-C3560G-24TS and try both ios 12.2.50.SE1 and 12.2.46.SE but problem the same. The config as following, interface GigabitEthernet0/1 no switchport ip address 1.1.1.2 255.255.255.0 [code].....
but I find the int g0/1 output traffic only can achieve about 500kbps then I try config below,
interface GigabitEthernet0/1 no switchport [code]....
I find int g0/1 output traffic only can achieve about 5Mbps,but if I change "srr-queue bandwidth limit xx" command xx to 20-90,the int g0/1 can achieve normal traffic bps, for example,
interface GigabitEthernet0/1 no switchport [code]...
the int g0/1 output can achieve 2Mbps that is correct,just only when limit set to 10%,the traffic only can achieve half of limit bandwidth.
i have a 3560 connecting to a sp with limited bandwidth. i have one interface on the switch whose traffic i do not want to drop. i want this traffic to go into the high priority queue. i am not sure how this should be configured, but here is my best guess and my current qos configuration on the switch:
How to configure cisco 3560 to force the client only can get ip by dhcp-relay server ?
The company i am working in has 5 vlans which have been set an lay-3 switch(3560), uses the dhcp-relay server .(in svi configuration: ip helper-address X.X.X.X) well , that works ok~
Now , I got my problem: I need to force the client only can get ip by dhcp-relay server, that means if anyone set static IP manunally , he can't really access to anywhere (to provent anyone set static IP with malignancy )
I know if a h3c router , how to set this configuration n svi configuration : dhcp relay security address-check enable ) the how to configure on a cisco 3560 ?
We want to get L2 traffic amount (bit/byte) passing through a cisco switch (6500/3560 ...) for a specific VLAN. it can be via SNMP or CLI ...How can we do that?
I have router connected to 2 3550 switches directly. 3550A and B switches are running HSRP. OSPF is running between Router and 2 switches.
From Switch B i can ping the Router Wan interface but not the internet sites. from Switch A i can ping any sites?
Switch B 3550SMIB# sh ip routeCodes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1
One of our customer , where there 2 6509 switch , one is Core_sw1 and other is Core_sw2 , catering about 32 Vlan , and HSRP in running for all Vlans , till here no problem , now there internet Router which having one Internet link , which connected and configured on Core_sw1 in a way that one interface of Core_sw1 is given Public IP and there is vlan 85 which internet vlan and vlan 85 ip are natted with that public IP with one simple static route given toward internet router , this is how internet is working ok.
Now i have configured vlan 85 in hsrp as all other are , how can give redundancy to vlan 85 user , that if Core_sw1 get down , internet traffic can get out through Core_sw2.using same internet router with single internet link .i am not talking of ISP redundancy , but Vlan 85 in Core_sw1 goes down , other Core_sw2 will server internet.
I'm fairly new to Cisco products am in the process of developing my network knowledge on a deeper level. I have a 3825 with a HWIC-4ESW and I'm struggling to fully understand how the two "see" each other. I've setup a V LAN with a layer 3 address on the HWIC and added the switch ports to it. This seemed to allow devices connected to the switch ports to talk to the built-in router ports. I thought this was all making sense until i applied an access-list to the router port. It's a simple ACL i'm just using for testing and the only thing it does is blocks telnet from anywhere. I know the ACL is setup properly because if I connect a device directly to the router port i cannot telnet to the port. However, if i connect a device to one of the switch ports, i am able to telnet to the router port successfully.
It seems that I'm missing something with how traffic flows from the switch port to the router ports and how the two "see" each other.
The 6509 Series Switches support the scenario VSS Active-Active Chassis, I would like to setup both switch's as one virtual switch but working at the same time, not with Active - Stand By Chassis.
My plans it to create PortChannel accross both Switches 6509 in order to have 2 links one connected to one slot/switch and the other connected to slot/switch in the second 6509 for servers redundancy.
I am working on a network which has two ISP connections (Active/Active) terminating on router (ASR1000). From the LAN side (6500 switch) all the traffic need to be route on ISP1 but some of the specific subnets like 10.250.0.0/16 need to be route on ISP2 connection.
I am planning to use PBR and NAT with route maps. any documents or refrences are provided.
I am having trouble getting some multicast traffic across a link. I have a 3750G setup, with IP routing and IP multicast routing, between two laptops. This will eventually sit between two networks that cannot be physically connected to each other for security reasons. I have static joins on the ports but cannot see the multicast traffic on the receiver. I am attaching the latest config. The sender(10.10.4.2) sits on gi1/0/24 and the receiver(10.10.3.2) sits on gi1/0/1. I am using VLC to test this and it will connect if I point the receiver to the address of the sender, but will not receive any multicast. The multicast traffic is not making it to the 10.10.3 side, I used wire shark to verify that it was not making it across.
