Cisco WAN :: 881 Losing Own Interface From Routing?
May 10, 2011
my 2 881 in a site, running IOS c880data-universalk9-mz.150-1.M4.bin suddenly lost their routing for the fe4(WAN)! It happened once to the 1st one and then to the other (no connection between them).
The problem is that wan interface, although it was up/up and had an ip statically, and was working fine, suddenly, although it was up/up it couldnot ping the directly attached other gw (i could ping the gw with a laptop having the same IP address as FE4) I issued show ip routing, and in the routing table i could only see the LAN network!!
The LED for FE4 was Green and flashing. I unplugged the patch cord and it turned to down, i replugged it, got up but still no routing at all. I had to issued shut/no shut on fe4 to resolve the issue. One day later it happend to the other 881.
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Aug 13, 2011
I have a problem where my outside interface stops passing traffic and the only way to resolve the issue is to reload the ASA, the interface never is down it just stops passing traffic. The inside interface never stops allowing traffic to pass as I can get to all my internal servers and shared drives.
The firmware is:
asa821-k8.bin
Running Config
: Saved:ASA Version 8.2(1) !hostname f1domain-name somedomain.co.ukenable password w1Y.GBKFyC5NqO3M encryptedpasswd 2KFQnbNIdI.2KYOU
[Code].....
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Nov 1, 2010
I have a client with an AP541n, most recent firmware installed. When he logs into the management interface (via IP using Google Chrome browser), it will work for a few minutes and then just disappear. If he attempts to reload the page he gets a message similar to a website being down (page cannot be displayed). The idle timeout has been extended to 4 hours, but this can happen at any point while logged into the interface.
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May 1, 2012
I have a Cisco ASA 5505 and I have my internal and external interfaces configured but I currently cannot ping from the inside to an IP Address on the outside. I had this setup and working and I have another set of equirement that I am replacing that is working with my service provider so I know it is a configuration issue. When I ping 4.2.2.2 for example I get:
Destination host unreachable
Do I need to add a static route from my inside interface to my outside interfaces?
: Saved
:
ASA Version 8.2(5)
!
hostname pxasa
[Code].....
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Jun 20, 2012
We have a new building where we added 3 network closets with 3750x stacks.We have 2 fiber gig ports connected to 2 microwave units and etherchanneled the to ports
We have the same setup at the corporate office except the connection is 2 fiber gig ports on a 6509. The 6509 is doing the routing
Now the problem is that we lost the connection to the management interface on only one of the three closets after a few days running. But some workstations at the corp office could reach it... others could not. The workstation were on the same VLAN. We solved the problem for a few days by shutting on of the fiber ports on the etherchannel. But is started happening again... now with PCs being installed at the new location.
The PC that was not working on the 3750x side could ping across to the 6509 but no further then that. It seems like an arp issue not routing because some devices are reachable and fully operational throughout the network.
Here is the configuration:
3750x:Cisco IOS Software, Version 12.2(55)SE1
Current configuration : 118 bytes!interface Port-channel1switchport trunk encapsulation dot1qswitchport mode trunkno snmp trap link-statusend
!interface GigabitEthernet1/1/1description 2gig to STB-6509switchport trunk
[Code]......
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Apr 1, 2011
Recently I connected a Linksys wrt54g broadband router so that my daughter could also be online. the problem i have developed is that while I have the router connected to my network, my internet keeps kicking me off. When I disconnect the router my internet stays on and I have no problems with it. I am working with a custom built PC with quad core processor, 4 gigs of RAM, nvidia graphics card
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Sep 19, 2012
My company just assumed management of a remote entity. The network has several misconfigurations and I need to make some network modifications from my office w/o losing access or incurring lengthy outage to the clients. The network consists of 1721 router and three 2960 switches.
- I only have access to the router from the Internet. I telnet off the router to the 3 switches.
The site uses a single class C 192.168.1.0 / 24. The router is running RIPv2 even though this is the only network. The prior network person (contractor) set up separate native vlans on each switch and all the ports are defined as Native trunk and access are defined to the VLAN interface assigned to the switch. So of course the logs are flooded with Native VLAN mismatch, Each 2960 switch is a VTP server but has no VTP domain.
basic network layout:
Internet => Eth [Cisco 1721] => Fa 0 192.168.1.254 ==> [SW1]
[SW1]
interface Vlan1
no ip address
no ip route-cache!interface Vlan220ip address 192.168.1.219 255.255.255.0no ip route-cache
[code]....
!interface GigabitEthernet0/1description SW2 Gi0/1switchport access vlan 204switchport trunk native vlan 204!interface GigabitEthernet0/2switchport access vlan 204switchport trunk native vlan 204!interface Vlan1no ip addressno ip route-cache!interface Vlan204ip address 192.168.1.224 255.255.255.0no ip route-cache Normally, I would assign the current 192.168.1.254 to a subinterface to Router Fe 0/0 but with each switch having its own native VLAN I am afraid I will lose connectivity to the downstream switches -- my only access is telnet off the Cisco1721 Router.
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Mar 12, 2013
Quick question here. Using 3750E series switches with multiple VLANS configured. These switches serve as our 'core'. I have SVIs configured for the different VLANs and add inbound ACLs in each of the SVIs to control traffic between VLANS. This switch also terminates a P2P Ethernet link which connects to our Colo facility. The port used for this is configured as an L3 port. I noticed today that I was able to send traffic across this L3 link that I thought should have been blocked by an ACL I had in place but it wasn't. So the traffic flowed from a port in say VLAN 20 across this L3 link (assigned with an IP address). Would this traffic flow not cause traffic to be checked against an ACL applied in the inbound direction on the SVI of VLAN 20 (int vlan 20)? Traffic does get checked when routing between SVIs. Why would it not get checked when routing between SVI and L3 interface?
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Mar 7, 2012
On a pair of my CISCO7609-s (engine:sup720-3B IOS Version:12.2(33)SRD4),some interfaces is configured as routing interface but also them are attend MSTP caculation and i really caught BPDU packet go out from these ports. [code]
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Feb 26, 2013
We got a layer3 switched network, with one vlan for every switch, routed by a cat4006. [code] So can we put some ports on different switches in, let`s say vlan 50, with different ips? For example, Port 0/3 on Switch 1 and 0/8 on Switch 2, but keeping the ip of the "old" vlan? Or is it necessary to configure a specified vlan interface with ip-adress for every vlan if i want to route it?
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Jan 7, 2012
I am a recent student to Cisco products and I have purchased some (what I thought was good) lab equipment to learn with on a budget. What I have is a 2948G switch and a 2620 router. My issue is this: the router has only one fast Ethernet port. Is it possible to use V LAN's and V LAN Interfaces on the router and switch to somehow emulate a second interface to connect to a WAN or sub net?
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Jun 20, 2010
I have configured 887 Router. ADSL with 3g(backup) everything is fine but the routing seems not working.interface ATM0 backup delay 120 60 backup interface Cellular0 no ip address no atm ilmi-keepalive dsl bitswap both [code] Tha nat is working but the routing seems not working. When I run remove "ip route 0.0.0.0 0.0.0.0 Dialer0" command I can connect internet. but it did not work. When I disconnect adsl line and run sh route, I see dialer 0 is the default route for 0.0.0.0. I need to configure backup route for 0.0.0.0 network
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May 2, 2011
PIX 525 6.3(4)120
I am trying to allow clients coming in from my "DMZ6" interface with source IPs from the subnet 192.168.2.0 /24 to ping and access hosts on my "DMZ1" interface with destination IPs in the subnet 10.5.11.0 /24. I think I have the associated static NATs and the ACLs set up to allow this to happen. What I have noticed from syslog messages is that the PIX is trying to build the TCP connection to the "Inside" interface, rather than to DMZ1. Even though the destination host (10.5.11.12) is directly connected on DMZ1, the PIX is still trying to send the traffic to the "Inside" instead. I tried adding a host route to force 10.5.11.12 /32 pointing to DMZ1 and the PIX still tries to send the packets Inside. This only seems to happen when I try to go from DMZ6 to DMZ1. If I try to access hosts located in DMZ3 for example, which is also a directly connected interface on the PIX, it appropriately builds the connection to DMZ3. Here are the pertinent rules. Why would the PIX want to build the connection to the Inside, even though it knows that the destination host IP is directly connected to DMZ1?
ip address DMZ1 10.5.11.1 255.255.255.0
ip address DMZ6 10.5.16.1 255.255.255.0
ip address inside 10.5.18.17 255.255.255.240
[Code].....
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Mar 26, 2013
I attached the complete config. The earlier discussion, I cannot select reply. Looks like ACL is denying it. But I am not sure which one or how to permit it.
sh run
: Saved
:
ASA Version 8.0(4)
[Code].....
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Aug 30, 2010
i've got a Cisco 877 router connected to an ADSL link. i'm using the show dsl interface atm just to have a look on its performance. i've tried to search on Cisco website on how to interpret the output but a blog gave me more info [URL]. My question now is, what readings do i consider? is it on the left (ATU-R) or on the right (ATU-C)?
877ROUTER#sh dsl int atm0 ATU-R (DS) ATU-C (US)Modem Status: Showtime (DMTDSL_SHOWTIME)DSL Mode: ITU G.992.1 (G.DMT)ITU STD NUM: 0x01 0x01Vendor ID: 'ALCB' 'ALCB'Vendor Specific: 0x0000 0x0000Vendor Country: 0x00 0x0FCapacity Used: 31% 85%Noise Margin: 34.0 dB 10.0 dBOutput Power: 16.0 dBm 12.0 dBmAttenuation: 10.0 dB 6.0 dBDefect Status: None None Last Fail Code: NoneSelftest Result: 0x00Subfunction: 0x15Interrupts: 1453 (2
[code]....
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Aug 20, 2012
WLC4404 - United States
Software Version 5.2.193.0
where the new WLAN dosn't seem to be routing... but it's not related to name length (ours only 6 charecters). It's almost seems like the new WLC interface (interface2) isn't configured for the same subnet that it's plugged into, but it is.We actually have 2 WLANS. Alot of the original config was done before my time, between about 3 different people. The original WLAN config works fine, but part of the problem is the WLC4404 was configured our server VLAN, thus when a client gets an IP, they are placed on our main server VLAN. Our WLC4404 is connected to our 6509 in our Datacenter, and we have dozens of PTP T1's to our remote offices, which all have WAPs.On the WLC4404, I've configured a new interface on port 2, vlan404, and I have the new WLAN using that interface. The WLAN security is using WPA2, and authenticates via our ActiveDirector services, as well as handing out DHCP from our Windows DHCP server.
The client wireless PC is able to connect to the WAP, but unable to connect to anything else. It can only ping the WLC4404 interface2 address, and nothing else. It does receieve DHCP info (via WLC via Windows DHCP server), but cannot see DHCP server.From the WLC4404: I can telnet into the management IP address, and can ping PC's on the new WLAN, and anyplace else, except the vlan gateway ip address on the 6509.From the 6509: when telnetted in, I can ping everything except interface2 of WLC on vlan404 and the wireless PC using the new WLAN. I am able to ping the ip address of int for vlan404. The 6509 somewhat see's the WLC int2 & wireless PC. Show ARP | inc 404 from the 6509 shows the IP's of the VLAN int, WLC int2, and wireless PC. Show mac-add-tab | inc 404 shows the WLC and wireless PC on same 6509 port.From my work PC (via LAN) at a remote location: I can ping everything except Int2 on the WLC, and the wireless PC.
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May 15, 2012
I notice strange input rates on the interfaces of a 881 router:
show int fa4
..
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec
..
30 second input rate 85000 bits/sec, 11 packets/sec
30 second output rate 16000 bits/sec, 9 packets/sec
221434 packets input, 287889736 bytes
..
..
142286 packets output, 15683576 bytes, 0 underrun
How can 11 packets/sec be 85000 bits/sec -- average packet size of 8KB?. The total packets input (221434 packets versus 287+ MB) also shows this kind of a 10KB+ average packet size. There is ahardly any traffic through the router when the above snapshot was taken so 11 packets/sec sounds right, but not the 85Kbits/sec.
The router is running c880data-universalk9-mz.151-4.M4.bin and config is simple with a single Vlan (inside NAT) with a public IPs on fa4 and a couple of IPs for dynamic NAT. Everything works fine except for these interface counters that look worng.
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Apr 15, 2013
I can't accsess web-interface on SF-300-24. My computer is on the same subnet. Can only access by RS232. The Switch doesn't answer on ping either. In the manual it says the switch has ip-adress 192.168.1.254.
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Mar 26, 2013
I have a WAN interface and 2 LAN interface. I need both the LAN be able to access a server outside the network via the WAN (outside) interface. I am using a ASA 5510 firewall instead of a router, because I don't have a router. It looks simple enough but it does not work. I ping from the a PC (172.16.22.8) connected to LAN (inside) Network to 10.10.10.1 which is the WAN local interface also did not work. But from the ASA Firewall, I could ping my LAN (inside) PC. I followed a config i get from this forum. However, it did not work. Below my config.
interface Ethernet0/0
nameif outside
security-level 0
[Code]....
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Nov 28, 2011
I have both a Easy VPN server and a site-to-site VPN on the same outside interface of a 2911 router.
Currently, a Easy VPN client has no route int the router then out the site-to-site VPN to the remote site.
How can I create this route?
[code]...
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Jul 7, 2011
I have two ethernet adaptors on my windows machine. OS is Win-XP.I am running ADSL broadband on LAN1 and on LAN2 I am accessing applications on our company's WAN. LAN1 is on 192.168.1.0/24 subnet and LAN2 is on 10.68.104.0/22 subnet.Accessing application through LAN2 involves DNS that is located distantly, therefore routers are also in picture.Problem is that while accessing the application that run on the network of LAN2, I have to disable LAN1. Otherwise the traffic goes on LAN1.
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Jan 18, 2012
There is some way to increase the speed of changing the interface state from DOWN to UP when the cable is connected. I need to configure a port of Cisco 4503 in a way that when a cable is connected the port goes immediatly UP.
A solution can be to keep Cisco interface always UP and I remember that with "no keepalive" command to the interface configuration it was possible. But I tried and nothing happens.
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Nov 17, 2011
How to confirm if a 10Ge interface can be set down to 1Ge if required ?
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Aug 31, 2012
I have a switch WS-C4507R + E, added two SFP SFP-10GBase-SR, and they stayed with inactive status, activate these interfaces in 10Gb.
SWC-DC01#sh interfaces status module 4
Port Name Status Vlan Duplex Speed Type
Te4/1 connected trunk full a-1000 1000BaseBX10-U
Te4/2 notconnect 1 full auto No XCVR
Te4/3 inactive 220 full auto 10GBase-SR
Te4/4 inactive 220 full auto 10GBase-SR
[code]......
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May 24, 2012
Got a shiny new SG 200 26P which seems to work fine operationally.owever, when I am trying to access the web interface from a different IP subnet, the web brower just times out.If I put my PC on the same IP subnet, it works just fine. From the other subnet, I can ping the switch fine. The default gateway is set on the switch, and from the web interface I can ping and dns resolve other hosts and on the internet. I've tried to create a management profile to 'allow all from everywhere' basically, but still no luck.I'm completely stumped. I've tried to reset to firmware defaults, and I'm now runinng the latest firmware. I woudl suppose that the switch would allow itself to be managed via the web interface from all subnets by default. Any thoughts? The fact that the switch can ping internet hosts makes be believe it's own default gateway and IP are all ok and working.. (and I can ping it from anywhere in my network).
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Oct 2, 2012
I have a CISCO2921. I am not able to bring up its gi0/1 interface. It stays down down.
[URL]
I know that interface is not coming up because of "no media" below. Router#sh int gi0/1 | i media Auto Duplex, Auto Speed, media type is no media
I have tried media rj-45 and media sfp which have also not worked. The other end of this link is ethernet handoff. What is it that I have to do for the link to come up? If I change the connection to gi0/2, I think that will work because I see this for gi0/2:
Router#sh int gi0/2 | i media Auto Duplex, Auto Speed, media type is RJ45
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Nov 20, 2012
I need to set up a L2 llink between my LAN and this 1921 router. I though IRB would do it but its not working yet. Here is the topology- I dont want to see another hop on this 1921 rtr so I hope I can just trunk it or something with IRB. Not working.
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Dec 28, 2010
I'm a networking newbie, but I bought the SG 200-08 switch to do Link Aggregation with and I can't access the web interface. I'm on a mac running 10.7.3, and I've tried Firefox and Safari. I've also tried on a friends PC with Internet Explorer 8.On the mac, I can go into the terminal and can see that the switch has the correct IP address and is seen on both ethernet ports.
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Jan 11, 2013
how do we configure sub interface for nexus 7k?do we have to issue ma-address command under physical interface and than configure subinterface? if yes than what do we have to type the mac address for "mac-address" command?I can doing and than configure subinterface but the interface/subinterface didn't come up. do we have to bounce it couple times to bringe it up?
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Apr 19, 2012
I am configuring my first 2911 using a SFP card but I dont know the interface name for this module.
show inv shows the card..
What is the interface number for this card or if it needs some config before it will recognize the interface?
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Feb 24, 2013
I have encounterd a broplem on my Cisco 805 model.
When i use the command "show ip interface brief" the status shows "up" but the protocol is "down" on my serial interface.
The link between my to sites is down after this happend.
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Jan 3, 2013
we've to configure our router 1841 to use both 2 interface Fe for two different vlan (also the second has to go on internet).
Actually we have int Fe0/0 configured with an ip address 192.168.1.1 for lan1 192.168.1.0/24 and we will use the second int Fe0/1 with another ip address like 192.168.2.1 for lan2 192.168.2.0/24.
see below configuration:
[code]...
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Jul 19, 2012
I am in the process of staging a couple of two new Cisco ASR 1004's which are located at two locations with a WAN link in between. I need to set up connectivity between servers plugged directly into each ASR router across the WAN link. The ASR has 16 gig interfaces (gi0/0/0 - gi0/0/7 and gi0/1/0 - gi 0/1/7), and a management interface (gi0). I have connected the WAN link to gi0/0/0 and put an ip address on it. The servers will be plugged into the remaining gig interfaces. I tried to create an SVI (vlan interface) in an attempt to create an L3 interface to support routing to these servers but these routers don't allow SVI's to be created. how to put these server connected ports on a vlan and to create an L3 interface to provide routing to them?
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