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pakitloss

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Cisco 2600 T1 w/BGP crawls at 345k.

Hi,

I have a new failover T1 configuration that is currently running on the failover side due to a router being down. I am running BGP with partial routes. Since the install I can not get speeds of any greater than 345k down and 900k up. Pinging the wan interface of my router shows alot of packet loss but my interfaces are clean and I have tried a different cable run. I can ping my upstream with <10ms replies and have tested out in front of the router and am getting full speed. I did a router reload this evening and now have only gotten one prefix. Was getting them earlier. My hardware is not taxed at all and I am baffled. Here is my show run:

Building configuration...

Current configuration : 2036 bytes
!
version 12.2
service nagle
no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname n4m-2600
!
logging buffered 4096 debugging
no logging console
no logging monitor
enable secret 5
enable password 7
!
clock timezone EST -5
clock summer-time EDT recurring
ip subnet-zero
no ip source-route
ip flow-cache timeout active 1
!        
!
no ip domain-lookup
ip name-server x.x.x.x
ip name-server x.x.x.x
!
no ip bootp server
ip audit notify log
ip audit po max-events 100
ip ssh time-out 120
ip ssh authentication-retries 3
!
call rsvp-sync
cns event-service server
!
!
!
!
!
!
!
!
interface FastEthernet0/0
 ip address x.x.x.x 255.255.255.252
 duplex auto
 speed auto
 no cdp enable
 no mop enabled
!
interface FastEthernet0/1
 ip address x.x.x.x 255.255.255.128
 duplex auto
 speed auto
 no cdp enable
 standby 1 ip x.x.x.x
 standby 1 preempt
!
router bgp 0000
 no synchronization
 bgp log-neighbor-changes
 network x.x.x.x
 network x.x.x.x
 neighbor x.x.x.x remote-as 0000
 neighbor x.x.x.x next-hop-self
 neighbor x.x.x.x soft-reconfiguration inbound
 neighbor x.x.x.x remote-as 0000
 neighbor x.x.x.x soft-reconfiguration inbound
 neighbor x.x.x.x route-map AS-MYNET-OUTGOING-UPDATES out
 no auto-summary
!
no ip classless
ip route x.x.x.x 255.255.255.0 Null0 245
ip route x.x.x.x 255.255.255.128 x.x.x.x
ip route x.x.x.x 255.255.255.0 x.x.x.x
ip route x.x.x.x 255.255.255.0 Null0 245
no ip http server
ip pim bidir-enable
!
access-list 2 permit x.x.x.x
access-list 2 permit x.x.x.x
no cdp run
route-map AS-MYNET-OUTGOING-UPDATES permit 10
 match ip address 2
 set as-path prepend 0000 0000 0000 0000
!
!
!
dial-peer cor custom
!
!        
!
!
!
line con 0
 login
line aux 0
line vty 0 4
 access-class 1 in
 exec-timeout 60 0
 password 7 11030E5C33190F2925
 login
 transport input telnet
!
no scheduler allocate
end


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Avatar of Les Moore
Les Moore
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Avatar of hairymonster
hairymonster

By omitting all the IP address info you may have hidden a possible BGP issue (flapping). Can you check if your BGP neighbors are statically reachable (either directly connected or you have to add a static route; otherwise a BGP can experiencing an internal loop if a nex-hop is also learned via BGP and the neighborships start flapping).
The other common cause of problems is the autonegotiated speed and duplex on the ethernet ports. I suggest you change that to whatever is really supported by the other end (e.g. "duplex full" and "speed 100").