FULL BGP ROUTING TABLE ON 7206 with NPE-200

Answered Question

I have 2ea 7206 with NPE-200 (attached drawing). Can some one tell me if these are capable of handeling a full bgp routing table. One router will be homed to 1 ISP and the other router will be homed to 2 ISPs. Both router will peer with each other. below is a show ver for both routers.


ROUTER 2#sh ver
Cisco Internetwork Operating System Software
IOS (tm) 7200 Software (C7200-IS-M), Version 12.2(31), RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2005 by cisco Systems, Inc.
Compiled Thu 11-Aug-05 15:58 by tinhuang
Image text-base: 0x60008940, data-base: 0x61312000


ROM: System Bootstrap, Version 11.1(13)CA, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)
BOOTLDR: 7200 Software (C7200-BOOT-M), Version 12.0(28d), RELEASE SOFTWARE (fc1)


ROUTER 2# uptime is 1 year, 46 weeks, 4 days, 2 hours, 48 minutes
System returned to ROM by reload at 12:18:56 UTC Fri Feb 22 2008
System restarted at 12:19:37 est Fri Feb 22 2008
Running default software


cisco 7206 (NPE200) processor (revision B) with 114688K/16384K bytes of memory.
Processor board ID 13252248
R5000 CPU at 200Mhz, Implementation 35, Rev 2.1, 512KB L2 Cache
6 slot midplane, Version 1.3


Last reset from power-on
Bridging software.
X.25 software, Version 3.0.0.
Primary Rate ISDN software, Version 1.1.


Number of Fast PAs = 2
Number of Fast+Medium PAs = 3
Total number of PA bandwidth points consumed = 420
Please refer to the following document "Cisco 7200 Series Port
Adaptor Hardware Configuration Guidelines" on CCO <www.cisco.com>,
for c7200 bandwidth points oversubscription/usage guidelines.


4 Ethernet/IEEE 802.3 interface(s)
1 FastEthernet/IEEE 802.3 interface(s)
2 Serial network interface(s)
4 Channelized T1/PRI port(s)
125K bytes of non-volatile configuration memory.
4096K bytes of packet SRAM memory.


62976K bytes of ATA PCMCIA card at slot 0 (Sector size 512 bytes).
4096K bytes of Flash internal SIMM (Sector size 256K).
Configuration register is 0x2102

------------------------------------------

Router1#sh ver
Cisco Internetwork Operating System Software
IOS (tm) 7200 Software (C7200-IK9S-M), Version 12.3(5f), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2005 by cisco Systems, Inc.
Compiled Fri 12-Aug-05 18:18 by ssearch
Image text-base: 0x60008AF4, data-base: 0x61E08000


ROM: System Bootstrap, Version 11.1(13)CA, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)
BOOTLDR: 7200 Software (C7200-BOOT-M), Version 12.0(9a), RELEASE SOFTWARE (fc1)


Router1 uptime is 11 weeks, 1 day, 2 hours, 23 minutes
System returned to ROM by reload at 12:45:59 est Tue Oct 27 2009
System restarted at 12:48:22 est Tue Oct 27 2009
System image file is "slot0:c7200-ik9s-mz.123-5f.bin"
Last reload reason: Reload command


cisco 7206 (NPE200) processor (revision B) with 114688K/16384K bytes of memory.
Processor board ID 15456081
R5000 CPU at 200MHz, Implementation 35, Rev 2.1, 512KB L2 Cache
6 slot midplane, Version 1.3


Last reset from power-on
Bridging software.
X.25 software, Version 3.0.0.


Number of Fast PAs = 3
Number of Fast+Medium PAs = 4
Total number of PA bandwidth points = 420


4 Ethernet/IEEE 802.3 interface(s)
1 FastEthernet/IEEE 802.3 interface(s)
1 Serial network interface(s)
1 ATM network interface(s)
125K bytes of non-volatile configuration memory.
4096K bytes of packet SRAM memory.


20480K bytes of Flash PCMCIA card at slot 0 (Sector size 128K).
4096K bytes of Flash internal SIMM (Sector size 256K).
Configuration register is 0x2102

Correct Answer by Giuseppe Larosa about 7 years 4 months ago

Hello Eferro,

an Internet full table is made of 300,000 routes nowdays and there is no way to have them in only 128 MB of RAM.


your devices can be used to accept default routes and a small subset of internet routes to perform some outbound traffic balancing.


In this way you can use local preference to choice the most preferred default route and you can accept specific routes from the other two providers.

So if there is a specific route the path where the route has been received will be used. If no specific route exists the best default route will be used.


But if there is a need for full BGP table you need to find other devices at least a 7206 VXR with NPE-G1 or NPE-G2.


Edit:

you cannot install NPE-G1 or NPE-G2 in these two devices they are c7206 not C7206VXR, a C7206VXR or C7204VXR  is needed.

Both the route processor and the chassis are in end of support.


Hope to help

Giuseppe

Correct Answer by Edison Ortiz about 7 years 4 months ago

You only have 128MB DRAM and based on the AT&T Route-Server


route-server>sh ip bgp sum
BGP router identifier 12.0.1.28, local AS number 65000
BGP table version is 17394190, main routing table version 17394190
303259 network entries using 36694339 bytes of memory
5586180 path entries using 290481360 bytes of memory
341965/52619 BGP path/bestpath attribute entries using 47875100 bytes of memory
71926 BGP AS-PATH entries using 1875788 bytes of memory
163 BGP community entries using 3912 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
BGP using 376930499 total bytes of memory


You need at least 512MB DRAM just to be safe.


Also NPE-200 is EOL and I don't recommend implementing new topologies using EOL hardware.


Regards


Edison.

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Correct Answer
Edison Ortiz Fri, 01/15/2010 - 12:50
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You only have 128MB DRAM and based on the AT&T Route-Server


route-server>sh ip bgp sum
BGP router identifier 12.0.1.28, local AS number 65000
BGP table version is 17394190, main routing table version 17394190
303259 network entries using 36694339 bytes of memory
5586180 path entries using 290481360 bytes of memory
341965/52619 BGP path/bestpath attribute entries using 47875100 bytes of memory
71926 BGP AS-PATH entries using 1875788 bytes of memory
163 BGP community entries using 3912 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
BGP using 376930499 total bytes of memory


You need at least 512MB DRAM just to be safe.


Also NPE-200 is EOL and I don't recommend implementing new topologies using EOL hardware.


Regards


Edison.

Edison Ortiz Thu, 02/18/2010 - 05:47
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I got a quote for 2 each 7206VXR routers with NPE-400 with 512 RAM. I think this should work. What do you think ?


If you are planning to have this router just for holding the global BGP table, that memory is sufficient.

However, if this router will run other services such as NetFlow, NAT, among others - you will be running into trouble.

I recommend 1GB RAM for some room to spare.

Correct Answer
Giuseppe Larosa Sat, 01/16/2010 - 02:01
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Hello Eferro,

an Internet full table is made of 300,000 routes nowdays and there is no way to have them in only 128 MB of RAM.


your devices can be used to accept default routes and a small subset of internet routes to perform some outbound traffic balancing.


In this way you can use local preference to choice the most preferred default route and you can accept specific routes from the other two providers.

So if there is a specific route the path where the route has been received will be used. If no specific route exists the best default route will be used.


But if there is a need for full BGP table you need to find other devices at least a 7206 VXR with NPE-G1 or NPE-G2.


Edit:

you cannot install NPE-G1 or NPE-G2 in these two devices they are c7206 not C7206VXR, a C7206VXR or C7204VXR  is needed.

Both the route processor and the chassis are in end of support.


Hope to help

Giuseppe

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