[bdNOG] BGP configuration issue in Caching Solution System

Fri Nov 22 11:02:47 BDT 2013

Dear Barua Da,

We are using OSPF in L3 and InternetRT. Server block1(BGP Server) use default route to VLAN10, Server block2(Cache Server) use default route to VLAN20 and server block3(Cache Server) use default route to VLAN30 of L3 Switch. 

We are using "next-hop-self" in InternetRT. The server is customized MSWE-Cache by allot, I see it's Linux kernel. 

MSWE-CACHE-SW#sh ip route

Gateway of last resort is not set

     116.0.0.0/8 is variably subnetted, 17 subnets, 3 masks
O       116.58.207.224/30 [110/3] via 116.58.207.57, 00:23:24, Port-channel1
O       116.58.207.228/30 [110/3] via 116.58.207.57, 00:23:24, Port-channel1
O       116.58.207.236/30 [110/3] via 116.58.207.57, 00:23:24, Port-channel1
O       116.58.207.240/30 [110/2] via 116.58.207.57, 00:23:24, Port-channel1
O       116.58.207.244/30 [110/2] via 116.58.207.57, 00:23:24, Port-channel1
O       116.58.207.248/30 [110/2] via 116.58.207.57, 00:23:24, Port-channel1
O       116.58.207.252/30 [110/2] via 116.58.207.57, 00:23:24, Port-channel1
O       116.58.207.1/32 [110/3] via 116.58.207.57, 00:23:24, Port-channel1
O       116.58.207.3/32 [110/3] via 116.58.207.57, 00:23:24, Port-channel1
O       116.58.207.2/32 [110/2] via 116.58.207.57, 00:23:24, Port-channel1
O       116.58.207.5/32 [110/3] via 116.58.207.57, 00:23:24, Port-channel1
O       116.58.207.4/32 [110/3] via 116.58.207.57, 00:23:24, Port-channel1
O       116.58.207.6/32 [110/4] via 116.58.207.57, 00:23:24, Port-channel1
C       116.58.207.32/28 is directly connected, Vlan10
C       116.58.207.48/30 is directly connected, Vlan20
C       116.58.207.52/30 is directly connected, Vlan30
C       116.58.207.56/30 is directly connected, Port-channel1 

=========================================================
InternetRT #sh ip route
Gateway of last resort is 114.130.3.141 to network 0.0.0.0

B*    0.0.0.0/0 [20/0] via 114.130.3.141, 2w0d
      1.0.0.0/8 is variably subnetted, 1555 subnets, 14 masks
B        1.0.0.0/24 [20/0] via 114.130.3.141, 1w1d
B        1.0.4.0/24 [20/0] via 114.130.3.141, 2w0d
B        1.0.5.0/24 [20/0] via 114.130.3.141, 2w0d
B- - -- - - - - - -
-------------------

CACHE-SERVER# 
(managed by our vendor Allot, I will provide you the show route today evening).

Regards,
Mirza Rakib
-----Original Message-----
From: nog-bounces at bdnog.org [mailto:nog-bounces at bdnog.org] On Behalf Of Aniruddha Barua
Sent: Friday, November 22, 2013 10:19 AM
To: Mirza Rakib; nog at bdnog.org
Subject: Re: [bdNOG] BGP configuration issue in Caching Solution System

Dear Mr. Rakib,

In this topology, your L3 switch has become a router and I presume you have static routing in InternetRT, Servers and L3 Switch to find each other. Instead, enable OSPF (or RIP) in L3 Switch, InternetRT and the Caching Servers if supported by all.

In present scenario, your Caching servers are getting Internet routes from InternetRT with next hop address 116.58.207.57, if next-hop-self is configured in InternetRT. 116.58.207.57 is on different LAN segment from the servers. What is the OS of Caching servers? Do the Caching servers support recursive route lookup? If these are Linux based servers, you need to find a way (route filters may
be) to modify the Target Scope of all routes received from InternetRT over iBGP. Better, enable OSPF (or RIP) as I mentioned earlier.

Regards,

ANIRUDDHA BARUA
 Email: aniruddha.barua at colbd.com, cto at colbd.com

---------- Original Message -----------
 From: Mirza Rakib <mmrakib at gmail.com>
 To: nog at bdnog.org
 Sent: Thu, 21 Nov 2013 22:23:59 +0600
 Subject: Re: [bdNOG] BGP configuration issue in Caching Solution System

> Hi Team,
> 
> Please have the architecture for your better understanding: 
> 
>   
> 
> On Thu, Nov 21, 2013 at 9:41 PM, Mirza Rakib <mmrakib at gmail.com> wrote: 
>  
> 
> Hi Team,
>   
> I am facing an issue to configure internal BGP (iBGP) where a L3 
> switch exist in between Router
and another Caching Solution Server. The architecture like: 
>   
> Router-A(BGP, AS45245)----L3 Switch(3 different VALNs: VLAN10, VLAN20 
> and VLAN30)-------BGP
Caching Control Server( AS45245, VLAN10)  
>   
>   
> BGP formed but there is routing issue. We can reach Router-A to all 
> Servers in differnet VLANs and
 vice versa but cannot reach outside and also from outside to servers are not reachable. We are getting some sites IP in BGP Caching Control Server bgp table. However we not reacing there, we got
loop or stack at L3 switch, whenever we trace.   
>   
> Sincerely,
> Mirza Rakib
> 
>  
>  
> --
> Sincerely,
> Mirza Rakib
> SUST CSE-2K1
------- End of Original Message -------

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