[c-nsp] Advice - c7200VXR with 2 bgp tables and peering fabric

Thu Jun 6 01:38:34 EDT 2013

Your milage  may vary but I never got more then +- 350/400 Mbps out  of an 7200vxr (npe-1g), above that CPU starts spending so much time on traffic forwarding that routing protocols get a bit neglected. (and I think you mean 150Mbps, not Gbps ;))

-----Oorspronkelijk bericht-----
Van: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] Namens Eric A Louie
Verzonden: donderdag 6 juni 2013 0:50
Aan: Cisco NSP
Onderwerp: [c-nsp] Advice - c7200VXR with 2 bgp tables and peering fabric

I have a c7204VXR NPE-G1 1GB RAM 6 GigE (3 on the NP, 1 on the I/O, and 2 PA-GE).  Passing about 150Gbps of traffic.  It's taking a full eBGP feed (470k routes), and connected to a peering fabric (30k routes so far).

When I turned up the peering fabric, I spiked the cpu for about 5 minutes and it settled down nicely.  CPU utilization now is 25% max on core1, 20% on core2.

I need to enable iBGP on it.  It's peer will be another c7204 (NPE-G1, 1GB, 3 GigE) with a full BGP feed (450k routes).  I have about 250Mbps backhaul link between the routers.  

Right now, the memory utilization is about 40% on both routers which leads me to believe I could easily hold 2 full tables on both routers.  I may end up with a 3rd iBGP peer with another full feed too, so if this ends up being linear, I'm figuring I can do simple math on the RAM utilization.

Can I get some confirmation from anyone who either has 2 BGP feeds on their 7200VXR or has iBGP with full eBGP tables on both routers, and tell me that I'm not going to melt down the two routers when I turn up iBGP?  My gut says I'll be just fine.

thanks
Eric

Stats below

core1#sh ip bgp sum
BGP router identifier 67.xxx.xxx.100, local AS number 2xxxx BGP table version is 17685401, main routing table version
17685401
447841 network entries using 52397397 bytes of memory
504542 path entries using 26236184 bytes of memory
80432/75327 BGP path/bestpath attribute entries using 9973568 bytes of memory
66127 BGP AS-PATH entries using 1820802 bytes of memory
4894 BGP community entries using 290336 bytes of memory
1 BGP extended community entries using 24 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 90718311total bytes of memory (about 100 Mbytes)
1258 received paths for inbound soft reconfiguration BGP activity 3808783/3360941 prefixes, 4450994/3946452 paths, scan interval 60 secs

Neighbor
V    AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
64.211.193.209  4  3549 4587262   41246
17685384    0    0
1w5d       446643
66.xxx.xxx.10   4 4xxx6   41288 3175949
17685384    0    0
4w0d            1
66.xxx.xxx.82   4 3xxx1  378453  371596
17685401    0    0
3w1d            1
66.209.124.90   4 5xxx7   41003
41292 17685401    0    0
4w0d            0
206.223.143.252 4 19996    9026
1035 17685384    0    0
17:04:00    28207
206.223.143.253 4 19996    9015
1035 17685384    0    0
17:04:00    28417

core1#show memory

Head    Total(b)
Used(b)     Free(b)   Lowest(b)  Largest(b) Processor   63ADD410   928131852   362097708   566034144
564822488   374483724 (about 350Mbytes)
      I/O
 C000000    67108864
12448104    54660760
54490928    54262236
Transient   7B000000
16777216       17436
16759780    16367684    16752164
utilization is 39%

core2#sh ip bgp sum
BGP router identifier 66.xxx.xxx.252, local AS number 2xxxx
BGP table version is 788940103, main routing table version
788940103
447789 network entries using 52391313 bytes of memory
447789 path entries using 23285028 bytes of memory
114097/114095 BGP path/bestpath attribute entries using 14148028
bytes of memory
114070 BGP AS-PATH entries using 3217852 bytes of memory
5 BGP community entries using 120 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 93042341total bytes of memory (about 100Mbytes
RAM)
17 received paths for inbound soft reconfiguration
BGP activity 11660283/11212493 prefixes, 13183481/12735692
paths, scan interval 60 secs

Neighbor       
V    AS MsgRcvd MsgSent   TblVer  InQ OutQ
Up/Down  State/PfxRcd
64.94.111.13    4 10912 733746106 1128729
788940103    0    0
25w5d      447757

core2#sh mem

Head    Total(b)    
Used(b)     Free(b)   Lowest(b)  Largest(b)
Processor   63AE23D0   928111436   369270884  
558840552   557289036   374463308 (350Mbytes used)
      I/O   
C000000    67108864    
8678976    58429888    58311184   
58154780
Transient   7B000000   
16777216       14944   
16762272    16525620    16762272
utilization is 40%
_______________________________________________
cisco-nsp mailing list  cisco-nsp at puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/