[bdNOG] BGP configuration issue in Caching Solution System

Mirza Md A Hu Al Rakib mrakib at banglalinkgsm.com
Fri Nov 22 11:28:19 BDT 2013


Dear Barua Da,

We have set the default route at Switch but it was an occurring an issue. When user traffics are trying redirect to Cache BGP server, in Switch it returning to Internet Router. As a result, user traffic not reached at Cache BGP Server.  Cache BGP Server do not have OSPF, but the subnet in OSPF network.   

InternetRT #sh ip ospf route

            OSPF Router with ID (116.58.207.2) (Process ID 45245)

                Base Topology (MTID 0)

    Area BACKBONE(0)

    Intra-area Route List
*   116.58.207.56/30, Intra, cost 1, area 0, Connected
      via 116.58.207.57, Port-channel3
*   116.58.207.240/30, Intra, cost 1, area 0, Connected
      via 116.58.207.241, Port-channel1
*   116.58.207.248/30, Intra, cost 1, area 0, Connected
      via 116.58.207.249, GigabitEthernet1/46
*   116.58.207.244/30, Intra, cost 1, area 0, Connected
      via 116.58.207.245, GigabitEthernet1/37
*   116.58.207.252/30, Intra, cost 1, area 0, Connected
      via 116.58.207.253, GigabitEthernet3/13
*>  116.58.207.228/30, Intra, cost 2, area 0
      via 116.58.207.254, GigabitEthernet3/13
*>  116.58.207.224/30, Intra, cost 2, area 0
      via 116.58.207.242, Port-channel1
*>  116.58.207.236/30, Intra, cost 2, area 0
      via 116.58.207.254, GigabitEthernet3/13
      via 116.58.207.250, GigabitEthernet1/46
*>  116.58.207.32/28, Intra, cost 2, area 0
      via 116.58.207.58, Port-channel3
*>  116.58.207.48/30, Intra, cost 2, area 0
      via 116.58.207.58, Port-channel3
*>  116.58.207.52/30, Intra, cost 2, area 0
      via 116.58.207.58, Port-channel3
*>  116.58.207.1/32, Intra, cost 2, area 0
      via 116.58.207.254, GigabitEthernet3/13
*   116.58.207.2/32, Intra, cost 1, area 0, Connected
      via 116.58.207.2, Loopback0
*>  116.58.207.3/32, Intra, cost 2, area 0
      via 116.58.207.246, GigabitEthernet1/37
*>  116.58.207.4/32, Intra, cost 2, area 0
      via 116.58.207.250, GigabitEthernet1/46
*>  116.58.207.5/32, Intra, cost 2, area 0
      via 116.58.207.242, Port-channel1
*>  116.58.207.6/32, Intra, cost 3, area 0
      via 116.58.207.254, GigabitEthernet3/13
      via 116.58.207.242, Port-channel1

-----Original Message-----
From: Aniruddha Barua [mailto:aniruddha.barua at colbd.com] 
Sent: Friday, November 22, 2013 11:20 AM
To: Mirza Md A Hu Al Rakib; Mirza Rakib; nog at bdnog.org
Subject: RE: [bdNOG] BGP configuration issue in Caching Solution System

Dear Rakib bhai,

What is the default route in the Switch? I see it is not set. Set it manually or get it from InternetRT over OSPF.

Please also show us the output of "show ip route ospf" from InternetRT and the same from CACHE-SERVER.

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


---------- Original Message -----------
From: Mirza Md A Hu Al Rakib <mrakib at banglalinkgsm.com>
To: Aniruddha Barua <aniruddha.barua at colbd.com>, Mirza Rakib<mmrakib at gmail.com>, "nog at bdnog.org"
<nog at bdnog.org>
Sent: Fri, 22 Nov 2013 05:02:47 +0000
Subject: RE: [bdNOG] BGP configuration issue in Caching Solution System

> 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 -------
> 
> _______________________________________________
> nog mailing list
> nog at bdnog.org
> http://mailman.bdnog.org/mailman/listinfo/nog
> 
> This email and any files transmitted with it are confidential and 
> intended solely for the use of
the individual or entity to whom it is addressed. It may also be legally privileged. If you are not the named addressee, you should not copy, forward, disclose or use any part of it. If you have received this message in error, please delete it and all copies from your system and notify the sender immediately by return e-mail. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. The sender does not accept liability for any errors or omissions.
------- End of Original Message -------



More information about the nog mailing list