[c-nsp] maximum dCEF routes on GSR engine 2 cards

[John van Oppen]

I am running into a problem where I am running out of dCEF resources on
a couple of engine 2 line cards (both of the suspect cards are three
port gigE cards) in my 12008s.   Anyone have hints on getting this usage
under control or at least some actual numbers on what the actual maximum
routing table size in the hardware forwarding table (since the E2_RX_TLU
indicator seems to indicate forwarding entries).

 

Interestingly this is not affecting the engine 0 line cards in the
routers, and I was wondering if anyone else with a full view of the
routing table was having this happen?   It seems on my side to just have
started one day and immediately have gone from a yellow alarm to 100%
utilization, so it seems to me like something could be wonky.

 

 

router>show ip cef re

Hardware resource allocation status summary

Green (Normal), Yellow (Caution) Red (Alarm)

Slot HW Resource Name        Util     Alert

2    E2_Rx_PLU                29        G

2    E2_Rx_TLU                100       R

3    E2_Rx_PLU                29        G

3    E2_Rx_TLU                100       R

 

 

Both cards are the following:

 

router#show cef line 3

CEF linecard slot 3, status up, fibhwidb sync, fibidb sync, adj sync

 Sequence number 20688, Maximum sequence number expected 21193, Seq
Epoch 2

 Send failed 0, Out Of Sequence 0, drops 0

 Linecard CEF reset 2, reloaded 2

 2091179 elements packed in 32971 messages(72011038 bytes) sent

 32 elements cleared

 0/0/0 xdr elements in LowQ/MediumQ/HighQ

 247773/34/286 peak elements on LowQ/MediumQ/HighQ

 Keepalive timer will expire in 00:05:59

 Init window timer is not running

 Input  packets 1904878439, bytes 1322133076937

 Output packets 1631996819, bytes 1062121911533, drops 0

 UTI input packets 0, bytes 0

 UTI output packets 0, bytes 0

 0 proc sw, 0 proc sw fail, 0 hdr error

 

 CEF Table statistics:

 Table name                Version Prefix-xdr Status

 Default                    404607     702947 Active, sync, table-up

 

 

router#show diag 3

 

SLOT 3  (RP/LC 3 ): 3 Port Gigabit Ethernet

  MAIN: type 68,  800-6376-05 rev B0

        Deviation: 0

        HW config: 0x00    SW key: 00-00-00

  PCA:  73-4775-07 rev C0 ver 2

        Design Release 2.0  S/N SAD09100D9E

  MBUS: Embedded Agent

        Test hist: 0x00    RMA#: 00-00-00    RMA hist: 0x00

  DIAG: Test count: 0x00000000    Test results: 0x00000000

  FRU:  Linecard/Module: 3GE-GBIC-SC=

        Processor Memory: MEM-GRP/LC-256=

        Packet Memory: MEM-LC1-PKT-256=

  L3 Engine: 2 - Backbone OC48 (2.5 Gbps)

  MBUS Agent Software version 1.100 (RAM) (ROM version is 2.41)

  ROM Monitor version 16.12

  Fabric Downloader version used n/a (ROM version is 10.1)

  Primary clock is CSC 1

  Board is analyzed

  Board State is Line Card Enabled (IOS  RUN )

  Insertion time: 15w2d (1d09h ago)

  Processor Memory size: 268435456 bytes

  TX Packet Memory size: 134217728 bytes, Packet Memory pagesize: 8192
bytes

  RX Packet Memory size: 134217728 bytes, Packet Memory pagesize: 8192
bytes

  0 crashes since restart

 

 

Any ideas on optimization would be appreciated.  

 

John