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Pussy Noise posted:Is there a way to debug UDP packets so that I can see which VLAN/subinterface they are received on? The router is a 2611XM, IOS 12.3(9a). Build an ACL on the interfaces if you are looking for specific traffic. A bit more info on what you are looking for and I can be of more assistance.
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Jul 31, 2008 14:53
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Why would a 3550 suddenly lose all config after a power failure? Bad flash? Anyone experienced something similar, and got any pointers on where to look for the culprit?
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Jul 31, 2008 20:31
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Bad flash, or forgetting to save running-config after changing it. 
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Jul 31, 2008 20:36
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Hehe, that would be typical.. But this was a old node that has been running for about a year without trouble, and I know for a fact that there have been done several writes of the running-config(because I have done it personally). Any tips on ways to test the flash? I guess I would have to prove bad flash somehow to do a RMA easily..
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Jul 31, 2008 21:29
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nex posted:Hehe, that would be typical.. But this was a old node that has been running for about a year without trouble, and I know for a fact that there have been done several writes of the running-config(because I have done it personally).
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Jul 31, 2008 22:19
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nex posted:Why would a 3550 suddenly lose all config after a power failure? Bad flash? Funny you should mention this- the exact same thing happened to a customer 3550 with us recently (they took power down for maint, the 3550 never came back). After getting it back in the office it appeared the flash was corrupted (IOS image was truncated to 0 bytes). Formatted, loaded a new image over xmodem (oh the humanity) and it started working again.
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Aug 1, 2008 00:10
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routenull0 posted:Build an ACL on the interfaces if you are looking for specific traffic. A bit more info on what you are looking for and I can be of more assistance. The router is a CE with several VRF-lites on separate vlans towards the customer LAN. One LAN segment needs a DHCP pool, so I have it on the router associated with the appropriate VRF. However, the customer's DHCP requests time out, and I don't know why, so I want to blame their LAN Procurve by showing that I'm not seeing any UDP broadcasts on that specific vlan.
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Aug 1, 2008 07:58
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Pussy Noise posted:The router is a CE with several VRF-lites on separate vlans towards the customer LAN. One LAN segment needs a DHCP pool, so I have it on the router associated with the appropriate VRF. However, the customer's DHCP requests time out, and I don't know why, so I want to blame their LAN Procurve by showing that I'm not seeing any UDP broadcasts on that specific vlan. Yeah build a generic log all ACL on the VLAN. There might be another way, but that is the quick and dirty way.
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Aug 1, 2008 12:26
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Does anyone know where I could get a replacement fan for a cisco 3500 switch? Two of the fans are good but the third just sounds awful.
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Aug 1, 2008 22:24
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We have a /27 from AT&T and currently use a C1841 as CSU/DSU & edge router. We then do the NAT (ip nat inside source static tcp x.x.x.x 80 x.x.x.x 80 extendable) on an old C1760. It's high time we had a proper firewall so I purchased an ASA 5505 with the security license. I understand I'll be able to use the ASA to configure a DMZ and add some much needed VLANs to the internal network but I'm now unsure whether I can do the same kind of NAT on the external interface. Is this possible or do I need another router between the ASA and edge?
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Aug 1, 2008 22:37
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Girdle Wax posted:Funny you should mention this- the exact same thing happened to a customer 3550 with us recently (they took power down for maint, the 3550 never came back). After getting it back in the office it appeared the flash was corrupted (IOS image was truncated to 0 bytes). Formatted, loaded a new image over xmodem (oh the humanity) and it started working again. Yep, we have to do the same thing for customers several times a year 
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Aug 1, 2008 23:37
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ozmunkeh posted:Is this possible or do I need another router between the ASA and edge?
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Aug 2, 2008 02:24
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CrazyLittle posted:And what's the handoff for the 2811? Routed IP space or more NAT? Routed IP space. Looking through the documents, it appears the 1812 only supports an asynchronous interface for the backup line. http://www.cisco.com/en/US/docs/routers/access/1800/1801/software/configuration/guide/dialbkup.html Did our consultant lie to use about the capabilities when we bought this over a year ago? I guess my option now would be to create an interface (eth1) on the 1812, connect the T1 to that (using one of the 5 ip addresses that we have), and then manually toggle them using the SDM interface when our cable connection goes out. Or is there a way to automate this?
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Aug 2, 2008 03:48
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jwh posted:ASA5505 can NAT. You'll be ok. Thanks for the confirmation. I just about managed to get my head around the basics of IOS recently. I got into the console of the ASA and it's all greek to me. I just ordered the Cisco Press Cisco ASA and PIX Firewall Handbook so I've got some reading to do. Thanks again.
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Aug 2, 2008 05:46
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I wrapped up the CCDA last week and I'm getting into the CCDP ARCH material now. I'm finding that design is really fun and I have a knack for it. Has anyone else taken the ARCH that has some tips? The info out there on the exam is scarce at best.
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Aug 2, 2008 05:49
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I'm setting up a small frame relay lab to get some experience while studying for the BSCI exam. I'm using a 2521 as the frame relay switch, and I have 3 routers connected to it, each with a 1T NIC. A 2621 is connected to serial 0, a 2620 to serial 1, and a 2611 to serial 2. The connections to serial 0 and 1 work fine, but the connection to serial 2 is always in a down/down state. I suspect this is because serial 2 and serial 3 on the 2521 are async ports, so I've tried setting it to sync but it's still down/down. Am I missing something or am I going to need a different router to act as the frame switch? code:code:code:code:code:
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Aug 2, 2008 16:27
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Paul Boz_ posted:I wrapped up the CCDA last week and I'm getting into the CCDP ARCH material now. I'm finding that design is really fun and I have a knack for it. Has anyone else taken the ARCH that has some tips? The info out there on the exam is scarce at best. The PDIOO process & Enterprise Composite model that Cisco pushes in their design certs are complete and total candyland nonsense used by no one.
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Aug 2, 2008 16:48
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inignot posted:The PDIOO process & Enterprise Composite model that Cisco pushes in their design certs are complete and total candyland nonsense used by no one. Okay? Cisco partners hire people with CCDA/CCDP certifications. My goal isn't to imagine I live in some fairy land where the PPDIOO and enterprise composite model exist in every network - it's to make myself as appealing to employers as possible. Cisco Partners sell cisco products. To sell cisco products you have to know how they're designed and implemented in cisco-oriented networks. That's what the design certs do. I've got a CCNP for the "real world" stuff. The design stuff is for the pay check.
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Aug 2, 2008 22:29
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By all means pursue the CCDP for the increased employability. I've been a CCDP since 2002 and worked for a Cisco global partner for the past five years. Just be aware that the CCDA/CCDP material is insane and has no applicability beyond the test. I suggest you cynically treat the test as a hoop jumping exercise for a piece of paper. It's not something to kick yourself in the rear end over. None of the Cisco sales engineers or professional services people I've ever dealt with used or ever even mentioned the methodologies in the CCDA/DP track. For any real world designs you need to do, draw upon the general routing and switching skills you've built via the CCNP track. Simply knowing the types of OSPF non backbone areas will put your expertise beyond 80% of the "engineers" you will encounter.
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Aug 2, 2008 23:42
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Paul Boz_ posted:I've got a CCNP for the "real world" stuff. Don't take this the wrong way, but I thought a CCNP was for the "real world" stuff too. It's not. Don't get me wrong, I think certifications serve their purpose, but I don't really agree with your expectations after obtaining them.
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Aug 3, 2008 02:19
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atticus posted:Don't take this the wrong way, but I thought a CCNP was for the "real world" stuff too. It's not. It's worked so far.
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Aug 3, 2008 08:30
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I'm in a CCNA class and currently working with a 2600 router. Part of the class involves password recovery/overriding and getting to the rommon> prompt by pressing break during boot. I'm using ZTerm on OS X 10.5.4 and it seems it won't send break properly. I have tried the shortcut command + B, and tried clicking on the menu item (my instructor did too, so I assume it's not my timing that is the problem) but neither of them cause it to bypass the normal booting procedure. Can anyone help please? Also if anyone can let me know what program (from Cydia on 2.0) I'd use to telnet to my devices from my iPhone I'd be very grateful. Sir Sidney Poitier fucked around with this message at 18:58 on Aug 3, 2008 |
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Aug 3, 2008 17:31
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Bob Morales posted:I guess my option now would be to create an interface (eth1) on the 1812, connect the T1 to that You know you cannot plug a T1 into an ethernet interface correct?
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Aug 4, 2008 11:41
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routenull0 posted:You know you cannot plug a T1 into an ethernet interface correct? I know that, I'm talking about the cable with the data side of the T1 on it, coming out of the router given to us from the telco.
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Aug 4, 2008 13:11
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Bob Morales posted:Or is there a way to automate this? There is a way to automate the fail-over, but it's complex. Normally you could simply use differently weighted static routes, but since your T1 is connecting to another router, and the link between these routers isn't likely to fail (and thus affect the route failover), you'll need to get creative. I forget who it was in this thread, but somebody had a working OER (now called PfR) configuration. You'll want to check that out. Or, alternatively, turn up some kind of dynamic routing protocol between your 1841 and your provider's router.
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Aug 4, 2008 16:50
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para posted:Am I missing something or am I going to need a different router to act as the frame switch?
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Aug 4, 2008 16:54
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jwh posted:I forget who it was in this thread, but somebody had a working OER (now called PfR) configuration. You'll want to check that out. Or, alternatively, turn up some kind of dynamic routing protocol between your 1841 and your provider's router. I was the guy screwing around with OER. In the end I found that it was fairly useless because it doesn't masquerade the return IP address, so while your outbound traffic will pick the best route, the return traffic won't, and you'll get insane latency. You can get around that by having the OER device also perform NAT, but all the customers I was going to use it on have firewalls with routed IP address blocks, and OER doesn't magically change the routing tables on other routers upstream.
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Aug 5, 2008 00:28
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Does anyone here fancy themselves an Aironet expert? We have a customer that's having a problem with a couple access points (AIR-AP1030-A-K9) that we sold them a while back.Customer posted:14 of the 25 will not attach to any of my controllers. Here's some of the message log: Error posted:Wed Jul 30 11:38:14 2008 [ERROR] spam_lrad.c 11449: Received replay error(slot = 0, vapId = 1, count = 1) from AP 00:0B:85:14:82:40 Is there really no way to fix the "will not connect to controller" issue without connecting it to a controller?
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Aug 5, 2008 17:11
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In preparation for my CCNA exam I'm running through some exercises on PacketTracer. I have noticed some odd behaviour and wondered if it's normal. Say I've got a simple network that goes: PC1 - switch - router - router - router - switch - PC2 And I've set up RIP properly. I try pinging from PC1 to PC to via CLI and it doesn't work. I then think "why doesn't this work?" and do the normal troubleshooting pings to each step in between, starting at PC1, moving towards PC2 and they all work. I then get to PC2 and do it again and it works - just only after I have pinged every step in between. Does anyone know why this is? Is this to encourage thorough troubleshooting or something? Or is it some feature of networking I'm overlooking.
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Aug 11, 2008 14:14
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M@ posted:Is there really no way to fix the "will not connect to controller" issue without connecting it to a controller? I was trying to figure this out for you, but I'm afraid I haven't found anything. I have a lot of 1130AGs that aren't in production yet, and I'd hate to discover that they can't be reset unless they're attached to a controller. I'll keep looking though, and hopefully we can find something.
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Aug 11, 2008 16:06
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I have dim memories of receiving a demo AP from Cisco that was configured in lightweight mode. I couldn't make any config changes until I converted it to autonomous mode. The conversion procedure was different from a typical password recovery. This may or may not apply to your issue: http://www.cisco.com/en/US/docs/wireless/access_point/conversion/lwapp/upgrade/guide/lwapnote.html#wp161272
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Aug 11, 2008 16:48
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Anjow posted:words You could be running into an ARP issue. I'm not very familiar with the Packet Tracer software though. tortilla_chip fucked around with this message at 17:55 on Aug 12, 2008 |
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Aug 11, 2008 19:18
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M@ posted:Does anyone here fancy themselves an Aironet expert? We have a customer that's having a problem with a couple access points (AIR-AP1030-A-K9) that we sold them a while back. Try config auth-list add mic 00:0b:85:5f:15:e0 and so on with the mac-addresses found in the auth failure messages.
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Aug 12, 2008 01:12
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Anjow posted:In preparation for my CCNA exam I'm running through some exercises on PacketTracer. I have noticed some odd behaviour and wondered if it's normal. If you are running rip, are you sure you have the router setup properly? Are the switches acting as layer 3 devices or just switches? The symptom you describe look like you have some overlap with your rip networks so rather than routing its using layer 2 and learning a mac-address then forwarding the frame based on the mac, rather than using IP.
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Aug 12, 2008 01:52
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The switches are just layer 2 and acting in the simplest capacity - no VLANs, just plug and play. Excuse my ignorance, but can you elaborate on the RIP overlap? Is that a router taking information from too many sources or something?
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Aug 12, 2008 11:20
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Rip is a classful protocol. What this means is that depending on how you have your routing config setup you could be ommitting a route between networks. Basically if you have say 3 networks and they are 10.1.0.0, 10.2.0.0, 10.3.0.0 you will most likely run into routing problems. The easiest way to help you would be if you posted the router config so that we can point out where the error is. Post your rip configs, as well as tell us what the IP addressing is. Also do a "show ip route" on each router, and post that info.
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Aug 12, 2008 17:50
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Okie dokie I will do that the next time it crops up - unfortunately I can't remember which simulation I was running when I last encountered it but it's not an urgent issue for me anyway. Next enquiry: I'm currently using a Linksys WAG200G to connect to my ISP and to organise port forwarding and so on. The problem is this device can only forward 20 ports and I may need more than that soon. Mainly out of interest (because I probably don't have the cash right now), is there any Cisco device I could replace it with? I would use the box my ISP provides to connect (it's poo poo as a router, but fine in bridge mode) and I could use an access point to deal with wifi - that's not to say I'd rule out any with wifi. I'd use the router (which would just need 2 ethernet interfaces really) to forward ports, maybe deal with QoS and maybe (eventually - once I'm done with the certification) some inter-VLAN routing one day. I don't mind ebay/second hand suggestions. Let me know if I've not been specific enough with requirements.
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Aug 12, 2008 20:39
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I'm using a Cisco 851w. It does Wireless, and I've had hundreds of ports forwarded with it (though that isn't pretty it is functional). It also runs IOS so if you want more familiarity with the capabilities of the operating system. They can be had for about 60 bucks 2nd hand. And even new they aren't that bad.
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Aug 12, 2008 20:55
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That sounds ideal, thanks. I would be looking for something that ran IOS just because. I think I'll have to wait for a deal to come up though because here (UK) they're £200+ new and I haven't seen any second hand. Edit: Just figured I'd tack this on - what does SDM stand for in this context? Is it 'Security Device Manager'? I searched acronymfinder and that's what it came up with but obviously it doesn't do contexts. Previously I'd known it to mean Space Division Multiplexing. Sir Sidney Poitier fucked around with this message at 21:16 on Aug 12, 2008 |
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Aug 12, 2008 21:08
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Try ebay. Maybe This.
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Aug 12, 2008 22:10
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