Re: [cisco-ttl] internet backup

From: Sinan Ilkiz <sinan.ilkiz_at_....>
Date: Wed, 31 Dec 2008 16:44:06 +0200


Selam,

Hat kesilince R1'in uzerindeki eBGP'nin dogal olarak 180 saniye sonra dusmesi gerekiyor. HSRP'de hangisi aktif olursa olsun R1 ile R2 arasinda iBGP varsa ic taraftan trafik oncelikle HSRP aktif olana gelecek ve sonrasinda iBGP sayesinde dis tarafta aktif olana gidecektir.

Bence burada dusunulmesi gereken baska bir sorun var. Dis dunyaya yap─▒lan eBGP anonsunu yapan router'in ic dunya ile iliskisi kesildiginde anonsu kesmesi gerekir. Eger kesmezse o zaman dis dunyadan gelen trafik ic dunya ile iliskisi kesilmis cihaza kadar gelip orada drop olacaktir.

2008/12/29 aydin ovali <ovatay_at_hotmail.com>

>
> merhaba;
>
> R1=> METRO ETHERNET (Me switch ) > ISP1
>
> R2 => LL > ISP2
>
> ├żeklinde ├žal├Ż├żan topolojimiz var.
>
> Isp ler ile Ebgp routerlar kendi aralar├Żnda ibgp konu├żuyor. daha ├Ânce R1
> de Me yerine LL vard├Ż . HSRP ile active pasive ├żekilde ├žal├Ż├ż├Żyordu. ancak
> Me ba├░lay├Żnca Gigabit eth Me switch ne ba├░l├Ż oldu├░undan hat kesilse bile
> down olmad├Ż├░├Żndan active router standby a d├╝├żm├╝yor normal olarak . a├ża├░├Żda
> router lar├Żn conflar├Żn├Ż yolluyorum . acaba nas├Żl bir conf de├░i├żikli├░ine
> gidebilirim .. ├Ârnek conflar varsa g├Ânderirmiziniz. yard├Żmlar├Żn├Żz i├žin
> ├żimdiden te├żekk├╝rler.
>
> R1;
>
> interface GigabitEthernet0/0.1 description MetroETH_TT_5mpbs encapsulation
> dot1Q 100 ip address 2.2.2.2 255.255.255.252!interface GigabitEthernet0/1 ip
> address 1.1.1.3 255.255.255.0 duplex auto speed auto standby ip 1.1.1.1
> standby priority 60 standby preempt standby track GigabitEthernet0/0.1
> 30!interface Serial0/1/0:0 no ip address!router bgp 44444 bgp
> log-neighbor-changes neighbor eguven peer-group neighbor 1.1.1.2 remote-as
> 44444
> neighbor 1.1.1.2 peer-group deneme
> neighbor 1.1.1.2 update-source GigabitEthernet0/1 neighbor 2.2.2.1
> remote-as 9121 ! address-family ipv4 neighbor 1.1.1.2 activate neighbor
> 2.2.2.1 activate neighbor 2.2.2.1 soft-reconfiguration inbound neighbor
> 2.2.2.1 prefix-list test no auto-summary no synchronization network 1.1.1.0
> mask 255.255.255.0 exit-address-family
>
>
> R2;
>
> !interface GigabitEthernet0/1 ip address 1.1.1.2 255.255.255.0 duplex auto
> speed auto standby ip 1.1.1.1 standby priority 50 standby preempt standby
> track Serial0/1/0:0 20!interface Serial0/1/0:0 ip address 10.15.0.2
> 255.255.255.0 load-interval 30 no cdp enable!router bgp 44444 no
> synchronization bgp log-neighbor-changes network 1.1.1.0mask 255.255.255.0
> neighbor eguven peer-group neighbor 1.1.1.3 remote-as 44444 neighbor 1.1.1.3
> peer-group deneme neighbor 1.1.1.3 update-source GigabitEthernet0/1
> neighbor 3.3.3.3 remote-as 13133 neighbor 3.3.3.3 description xnet neighbor
> 3.3.3.3 ebgp-multihop 3 neighbor 3.3.3.3 route-map enet out no auto-summary
>
>
>
>
>
>
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[Non-text portions of this message have been removed] Received on Thu Jan 01 2009 - 15:52:00 CET

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