From: Howard C. Berkowitz (hcb@gettcomm.com)
Date: Thu Jan 22 2004 - 22:06:35 GMT-3
At 6:37 PM -0800 1/22/04, Joe Chang wrote:
>Isn't synchronization an issue only when your network is acting as a transit
>AS? In other words, isn't sychronization usually turned off?
Synchronization is a totally obsolete technique, used when ISPs
routinely redistributed all routes into their IGP. It's now off by
default.
As a minor factoid, the environment for which synchronization was
marginally fitted is the reason that the OSPF Type 8 LSA (Database
Overflow) was defined, but, as far as I know, never implemented.
Better iBGP and pervasive BGP was a better solution and is the best
current practice.
My recollection is that Cisco said it's gone from the lab, but I
can't remember where I saw that. Anyone have better wetware?
>
>----- Original Message -----
>From: "Ashok Verma (ashoverm)" <ashoverm@cisco.com>
>To: <ccielab@groupstudy.com>
>Sent: Wednesday, January 21, 2004 8:07 PM
>Subject: BGP Question ( No Sync)
>
>
>> Hi All
>>
>> I have a query about the NO SYNC .
>>
>> I have following topology
>>
>>
>> R1______R2
>> \
>> \ __R3
>>
>>
>> R1, R2, R3 are in same AS and R1and R2 are FR ( where R2 is Hub and
>> ospf area 1 is running between them ), and R2- R3 is the normal HDLC
>> connection( OSPF area 0 is running between them).
>>
>> BGP peering is done using the Loopback addresses , and peering is
>> working fine.Here R2 is working as Route reflector(only R2 is peer to R1
>> and R3,no peering between R2 and R3)
>>
>> When I create a loopback on R1, and adverise with network command. It
>> reaches to R2 , but not as the best route and hence it is not send to
>> R3. Since the network was not redistributed in OSPF, I feel it is a
>> issue of Syncronization .so I disable the sync on R2 and then route is
>> avilable on R3.
>>
>> Am I doing correct ?
>> Is NO sync is allowed in Real Lab exam?
>>
>> Thanks in advance
>>
>>
>> Ashok Kumar Verma
>> CCIP,CCDP,CCNP
>> Network Consulting Engineer
>> Customer Advocacy Advanced Service Dep.
>> Service Provider AS Div.2
>> Cisco Systems, K.K.Japan.
>>
>> Tel: +81-3-5324-4583
>> e-mail: ashoverm@cisco.com
>>
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