Cisco WAN :: 7206VXR Router Not Respecting AD Rules Between EBGP And EIGRP
Apr 17, 2012
I have a setup where a router learns a subnet from both EIGRP process and a BGP process (EBGP peer). In the network's normal state, the EBGP path is preffered path (Primary Path). When the route to the subnet is lost in EBGP, then the router will install the EIGRP learn route into the routing table and use that as its path to get to subnet now (Backup path). This works as expected.
The problem is when the EBGP learn route comes back, the Router still holds on the EIGRP learned route in its routing table. I would think that since the Admin Distance (AD) of EIGRP (90) is higher then the EBGP AD (20) that once the EBGP route is learned again, that it would re-install itself back into the routing table (replacing the EIGRP learned route). But this is not happening.
Im not sure what Im missing here since I thought AD was highest considered attribute the routing table consider when install a route learned from 2 routing process.
The setup Im running is an Cisco 7206VXR (NPE-G2) processor (revision A) running IOS c7200p-spservicesk9-mz.124-15.T12.bin.
I have a mixed WAN environment with both eBGP and EIGRP routes. The BGP routes should always take precedence, when they exist. If no BGP routes exist I want the router to fail over to using the EIGRP routes. So far, this works fine.
The problem is, when the BGP route again becomes available (and the associated entry appears in the "sh ip bgp ... received-routes" output) the router is NOT relinquishing the EIGRP route. It remains in effect, showing as a "D" route int the route table even though there is a better ("B") route available. If I bounce EIGRP or the interface associated with it, the EIGRP route disappears and the BGP route reasserts itself, and everything will run correctly until the next time the BGP route disappears due to maintenance, line failure, etc.
My router is (C2900-UNIVERSALK9-M), Version 15.3(1)T
Here's the associated config interface Tunnel101 description VPN backup WAN interface bandwidth 7168 ip address 192.168.75.1 255.255.255.0 [code].....
I have setup an eBGP session to a Cisco 2801 CE router. The BGP session establish, however, the session keeps resetting after 90 sec which is the BGP keepalive holdtime value.
On the PE router I found that the OutQ doesn't clear = 22 when doing a "sh ip bgp x.x.x.x summary" - Session reset at 1:30.When I filter the amount of routes advertized to the CE neighbor with the "neighbor x.x.x.x prefix-list out" - I see the OutQ clear = 0 and the BGP session remains up.
-Number of NRLI advertized without prefix filter = 172 -Number of NLRI after filter = 52
a customer of us asked if C2911 (to be bought) is ok for partial BGP routes.This is the situation: 2 cisco 2911, each peering with 3 other AS (AS1, AS2, AS3), and maybe, in the future, at a small IXP (AS4, AS5, AS6, AS7).They will accept defaults plus partial routes from upstream AS1, AS2, AS3.When deployed at the IXP they also will accept partial routes from AS4-7.So, is 2911 ok for that configuration?the default route is included in the first row of as-path, isn't it?I have no experience with partial routes, only with full (for our datacenter) and default only (for other customers).
am use router Cisco 7206VXR (NPE-G2) ram 1G now am enable bgp routing full route aboute 400K record , ospf routing maximum traffic throughput is 400 Mbps but the cpu utilize is 80%
I would like to know how long a route would maintain its community tag when it traverses ***?Basically, a route is tagged 100:1000 when exiting AS100, and then accepted into AS200. AS200 will not modify the tag. Would AS200 export the route to AS300 with the same 100:1000 tag?
My 2811 is connected with two ISP,s as below and have VPN with Central branch.I want to set DSL as primary and WiMax as secondary but problem is that routes learned via BGP get precedence over default route as they are specific one.I think i may need to put all static specific routes of central branch over DSL along defautl but I want any idea if my default route stay active and when it down then BGP neighborship can be establish (like ip sla tracking.)
I am imagining a smallish networking (AS1234) with say three full BGP table peers that provide transit to the network (just to keep the maths simple here); Lets say AS100 and AS200 are preferred transit providers with AS300 as a backup/least prefered (AS prepends or similar stop us from using this network by default). So in this scenario our little network gets two different paths across the Internet, as not to rely solely on one provided, with a backup provider to hand also.
How do you mange issues like packet loss somewhere in AS100's or AS200's network? So lets say a host on our AS1234 network is talking to host in AS888 and the preferred route is through AS100 but somewhere deep in AS100 a link is flapping (for example) and I can't get to AS888 reliably through there anymore, but I can through to other peers of AS100 OK. We can postulate that AS100 is the best path for 50% of the Internet and AS200 for the other 50% (this is a best case fictional scenario). I can't ping 50% of the internet via AS100 and then in the event a ping fails (or some other more reliable test) tear down the BGP session to use AS100 until it's fixed again, nor vice versa with AS200.
First of all, I asume you don't know about the issue between AS100 and AS888 until someome moans about it to you? Secondly, do you then some how modify the route(s) to AS888 that come from AS100 (route map for example to change the weight or preference) so AS200 is now preferred for AS888? Do you infact shut down the AS100 peering and now use AS200 & AS300? How do you rectify these situations that are beyond you control using what is in your control?
I've inherited a 7206VXR router and it takes very long to boot. It outputs READonly ROMMON initialized to the console and 14 minutes later it continues the boot process. After 17+ minutes the boot is complete with the correct full image. The processing engine I have is the NPE-G1 and I'm looking for an upgradeable ROMMON image or a reason why the boot is taking this long.
I work for a non-profit agency and a donor gave us a generous donation of used Cisco equipment. One of the items is a SM-VAM2+. We tried it in a 7206VXR chassis with a NPE-G2 running 12.4(24)T6 and the router keeps barking that the SM-VAM2+ is not supported in the chassis. We have done searches on the Cisco web site and Google and there is no information regarding the SM-VAM2+ at all (all of the references are for the SA-VAM2+).
The question is if the SM-VAM2+ is supported on the 7206VXR with another version of IOS or what router supports the SM-VAM2+?
My client has MPLS network via eBGP to communicate with all the sites. Here is the basic config on the router.router eigrp 65210.neighbor 192.168.1.2 remote-as 13939
When they installed the internet on the local router, and added the static route on the router to hit the internet, they need to add the static route (2nd one) to communicate to the other sites.
ip route 0.0.0.0 0.0.0.0 75.75.75.1
ip route 192.168.0.0 255.255.0.0 192.168.1.2
ip route 172.20.0.0 255.255.0.0 192.168.1.2
They want to route all the traffic out thru the local intenet besides their private networks ( 192.168.0.0/16 and 172.20.0.0/16). Are there ways not to add last two static routes and communicate the other sites via eBGP?
I want upgrade IOS on my 7206VXR from 12.4(12c) to 15.1(4)M5 , but the CF card only 64M.
-NAME: "disk2", DESCR: "64MB Compact Flash Disk for NPE-G1" -Router#show bootvar
BOOT variable = disk2:c7200-jk9s-mz.124-12c.bin,15.1(4)M5 is almost 40M. So there is not enough space.I want to ask is it ok if I upgrade with normal precedure , With the command " copy tftp: disk2: " ?Does the router will automatically delete the older IOS first and then copy into the new one ? Or Is there something I should pay attention first ?
We have software router vyatta and about 15 branches with cisco 881w and cisco 1941. All branches have 10mbs bandwidth and 3 of them have 50mbs. Link to vyatta has 100mbs bandwidth and situated in datacenter.All branches connect to vyatta via vpn site-to-site with ipsec.I want to change vyatta to cisco router or asa.
I need to configure BGP on our 7204 and 2811 router. The 7204 is our main router and currently running EIGRP internally. Our remote locations just moved to an MPLS connectivity and they have a 2811 router. I will need to configure BGP for the routing protocol. I have the AS number and the remote AS number. Attached is the the current configuration of the two routers.
In EIGRP, if a router loses the successor to a route, and it has no FS, it goes active (starts asking all neighbors if they have a successor for that route).But if the neighbor did have a successor, shouldn't they have pro-actively told us about it when they learned it (so we already have it as the Feasible Successor?).
I redistribute our MPLS eBGP routes into our internal EIGRP process at each site. This action undesirably redistributes locally generated BGP networks (via network command) that are meant from the MPLS cloud into our internal routing process.I currently have a route-map on my 'redistribute bgp' command that filters each network manually with an ACL. This works but adds obvious administrative overhead; each WAN router advertises different networks, and the ACL must be updated for each new network.Would it make more sense to simply deny routes from BGP to EIGRP with a metric of 32768? Something like this,route-map deny-local-bgp deny 10 match metric 3276 router -map deny-local-bgp permit 20,router eigrp 100 redistribute bgp 65104 route-map deny-local-bgp.
I got myself lately Cisco SR520 router with some basic firewall functions built in. This is going to be used for my home broadband, so no need to be really super secure, as it would be for some business. I managed to configure it, however there are few things on the firewall side, which I don't understand.
This router had some default configuration in it's flash, when I bought it. There are class maps.... how it works or how to add/edit rules. Also, do I need to use class maps, or can they be replaced by ACL's to certain extend? How to add/edit class maps rules to allow certain port (eg. 3333). Pease see below part of the default config:
class-map type inspect match-any SDM-Voice-permit match protocol sip class-map type inspect match-any sdm-cls-icmp-access match protocol icmp match protocol tcp [Code]...
I am working at a client site today on a routing issue. I am currently working on an issue where a 3750 switch running EIGRP will not update its neighbor router when a network statement is added to the eigrp instance.The neighbor is a 3825 router.
Both the switch and the router have a common network which is 192.168.36.0/24. Both the switch and the router are in a neighbor adjacency. Both boxes have "no auto-summ" in the routing configuration instance.
I can run debugs on both routers (debug eigrp packets) and then I can watch queries and updates when I issue "auto-summ" or "no auto-summ". Also I see a "graceful restart" for the peers when this is done.I had an expectation that when I added the network (this is just an arbitrary network for testing, which is 172.16.69.0/24). I wanted to watch this network being sent in an update to the neighbor router.When I add the above mentioned network, there are no updates packets sent from the 3750 to the 3845. I have not had success to this point trying to resolve. I have followed the Cisco document "Troubleshooting EIGRP Flow Chart", but have exhausted all it has to offer and now it is at the point where it is telling me to contact TAC.
I have a pair of data center core 6500 is running a single EIGRP AS with the standard core redundant cross connects. Recently an SVI sub net was expanded from a /24 to a /23 and dropped out of the EIGRP routing table. Subsequent trouble shooting lead to the router id being one using an IP address that is no longer active IP address.
Reviewing old configurations I found, that year ago, the ip address used for the EIGRP router-id (10.100.106.3) was removed from the active interface and changed but the EIGRP router-id was not updated. The switch has not been rebooted since, no loop back is configured and there is not a higher IP configured on an active interface. Reviewing documented material on it, I cannot find anything specific on this condition but do see in the discussions on duplicate IDs, that new route updates can be a problem. I know how to update the router id but I am looking for confirmation on what would be the impact when I add a new loop back and manually configure the router-id under the EIGRP process with the new loop back IP.
My assumption is an EIGRP update and route re convergence with the standard 90 seconds of outage. How to confirm this is assumption is correct? I have no test bed to find out myself without doing this on the active cores.
show version Cisco IOS Software, s72033_rp Software (s72033_rp-IPSERVICESK9_WAN-M), Version 12.2(33)SXI5, RELEASE SOFTWARE (fc2) show inventory NAME: "WS-C6504-E", DESCR: "Cisco Systems Cisco 6500 4-slot Chassis System"PID: WS-C6504-E VID: V01, SN: <deleted> NAME: "1", DESCR: "WS-SUP720-3B 2 ports Supervisor Engine 720 Rev. 5.3" PID: WS-SUP720-3B
I bought the EA2700, and put the addresses for the DNS servers of OpenDNS into the Static DNS 1, 2, and 3 so that my internet access is filtered (OpenDNS provides content filtering). However I read online that users can bypass the use of OpenDNS DNS servers by choosing their own DNS servers on their computer network connections.The solution is involves firewall rules that limit DNS servers accessed through port 53 to only OpenDNS.
I have a system with a RV042 managing the internet connection.Behind the RV042 I have an e-mail server and a development machine that I access through SSH.My problem is that if I forward port 25 to my internal e-mail server it bypasses the firewall rules.I have an external vires and spam scan host that is the only one I should accept incoming email from - but it seems that whenever you add a portforward then it bypasses the firewall rules.
I have a Cisco 7206VXR with NPE-400. The IOS version is 12.4(24)T3. I installed a SA-VAM in the router in slot 6 but getting the following on the console.
AP-Pune-RT#Feb 23 11:16:34.484: %PA-3-NOTSUPPORTED: PA in slot6 (Unknown (type 650)) is not supported on this chassisFeb 23 11:16:34.484: %PA-3-DEACTIVATED: port adapter in bay [6] powered off.Feb 23 11:16:34.584: %PA-2-PABRIDGE: Failed to config bridge for PA 6Feb 23 11:16:35.384: %PA-4-IMPROPER_REMOVAL: Improper removal for slot 6.Feb 23 11:16:35.384: %PA-3-DEACTIVATED: port adapter in bay [6] powered off.Feb 23 11:16:35.468: %CRYPTO-4-PKT_REPLAY_ERR: decrypt: replay check failed connection id=975, sequence number=677864
Is the SA-VAM not supported in the Router 7206VXR?
We have a 7206VXR with an NPE-G1 processor. We're running the standard stuff on it, but here are the highlights.We just enabled netflow on it to send the data to an external source for analysis and the overall CPU level increased, but not significantly. About what should we expect for the overall CPU level? At this point, it's averaging close to 40% during peak hours.
I am having trouble with gathering inventory for 7206 XVR devices. I got this error:
RICS0001:Internal Error,unable to process the collected data from the device
How can I make the inventory work for these devices ?
Here's an excerpt from IC_Server.log:
[ Tue Nov 29 16:24:53 CET 2011 ],ERROR,[Thread-31],com.cisco.nm.rmeng.inventory.ics.server.InvDataProcessor,458,SQL Anywhere Error -193: Primary key for table 'MemoryPool' is not unique
System Bootstrap, Version 12.4(12.2r)T, RELEASE SOFTWARE (fc1)Technical Support: [URL] Copyright (c) 2006 by cisco Systems, Inc.Socket jumper: not present Failsafe jumper: present = normalFPGA revision 0x00000026C7200 platform with 2095104 Kbytes of main memory
Readonly ROMMON initialized
Self decompressing the image : #################################################################################################################################### [OK] %ERR-1-SRAM: Bus error on SRAM interface%ERR-1-FATAL: Fatal error interrupt, No reloadingerr_stat=0x80, err_enable=0xFF, mgmt_event=0x10
System bridge dump: PCI B:3 D:0 F:0 Reg:0x00: device and vendor id = 0x648511ABPCI B:3 D:0 F:0 Reg:0x04: status and command = 0x02B00000PCI B:3 D:0 F:0 Reg:0x08: class code and rev id = 0x05800004PCI B:3 D:0 F:0 Reg:0x0C: hdr type, lat timer and cls = 0x80804000PCI B:3 D:0 F:0 Reg:0x10: PCI CSN0 BAR (LOW) =
I am observing very high CPU utilization on my Cisco 7206VXR (NPE-G1) Router. We have done all the necessary troubleshooting but not able to identify root cause. [code]
I have CISCO 7206 router with NPE-G2 and 2 gig of memory. There's a vpn and pppoe servers on this unit and it hold maximum of 250-300 simultaneous connections. Periodically (1-5 times/hour) router suddenly reboots with lots of messages in console:
IPFLOW: Warning: V5 overfill -Traceback= 0x14975E4z 0x1A133F4z 0x1A16CC0z 0x1A17754z 0x1A17870z 0x3337874z 0x28F80Cz 0x66A704z *** System received a Software forced crash ***
[Code].....
I googled about first "V5 overfill" but no luck, i analyzed crashifo's with cisco tool and it said - it is ios problem, but if i change ios - problem lives again, no matter which ios i use.
We have subscribed for MPLS links from Service provider we have a DC where the core connectivity is 90 MB and Remote branch location Connectivity is 64 Kbps. We are in process of enabling QOS for our links with co-ordination with Service provider ; as per our finding the branches have more RX traffic (downloading) so after discussion with provider we were advised to mark traffic from the core end and give it to the provider.The provider at its PE will honor the marking and set some B/W percentages and prioroty based on the DSCP marking values.
We need to mark this traffic so it is feasible to mark the traffic at the core DC router which has the below H/W details,Cisco 7206VXR (NPE-G2) processor (revision A) with 917504K/65536K bytes of memory. Processor board ID 36161439 MPC7448 CPU at 1666Mhz, Implementation 0, Rev 2.2 6 slot VXR midplane, Version 2.11
or is it feasible to mark the traffic at the core switch.
