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S6700 series switch routing is not working as properly

Publication Date:  2018-03-30 Views:  69 Downloads:  0
Issue Description

Customer checked routing from S6700, when he tracer the routing it not working as properly.

 

From the routing-table:


From trace:




Alarm Information
N/A
Handling Process

1When check the ipv4 forwarding information base:

[HUAWEI-diagnose]displ adp-ipv4 fib 103.74.75.2 slot 0

Prefix                   : 103.74.75.0/24

Prefix State             : Downloaded

Vrf Index                : 0

Downloaded NHP Count     : 2

ECMP Index               : 2

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

[01]  NextHop Type          : IP

       NextHop Address       : 10.250.10.50

       NextHop Index         : 42

       NextHop State         : Downloaded

       PDT Index             : 0x82000014

       Vlan                  : 503

       NHP VrfIndex          : 0

       Reference             : 22

       MAC Address           : dc-eb-94-67-db-56

 

[02]  NextHop Type          : IP

       NextHop Address       : 10.250.10.18

       NextHop Index         : 44

       NextHop State         : Downloaded

       PDT Index             : 0x82000011

       Vlan                  : 1210

       NHP VrfIndex          : 0

       Reference             : 22

10.250.10.50    dceb-9467-db56  13        D-0         XGE0/0/20      

                                           503/-  

10.250.10.18    dceb-9467-db40  16        D-0         XGE0/0/17      

                                         1210/-

But from the trace, the next-hop is not as properly


2check the ipv4 forwarding information table it takes more than 20k but in current mode only can support 12k.

[HUAWEI-diagnose]display fib statistics all

IPv4 FIB Total Route Prefix Count : 20546; Entry Count : 20639

 

IPv4 FIB Public Route Prefix Count : 20546; Entry Count : 20639

 

[HUAWEI-diagnose]disp adp-l3 ability slo 0

Ability:

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

  MPLS             : YES

  ECMP_HASH        : YES

  GRE              : YES

  SUBIF            : YES

  TUNNEL4OVER6     : NO

  TUNNEL6OVER4     : YES

  INNER_LOOPBACK   : NO

  IPv6             : YES

  SUPPORT_VASP     : NO

  URPF             : YES

  URPF_GLOBAL      : NO

  URPF_ONPORT      : YES

 

Spec:

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

  FIB4             : 12288

  NHP              : 49150

Root Cause

Ipv4 forwarding information table exceed current specification

Solution

Modify the resource mode, and then restart the device to expand the FIB specifications, Command as follow

 [HUAWEI-diagnose]assign resource-mode ipv4-ipv6 6:1


Suggestions

Notice the device status if device Ipv4 forwarding information table exceed current specification, It will create logs only once times.

 

#Mar  9 2018 21:05:53 HUAWEI L3MB/4/FWDRESLACK:OID 1.3.6.1.4.1.2011.5.25.227.2.1.5 The layer 3 resource usage has reached or exceeded 85%.(EntPhysicalindex=67108873,EntPhysicalName=MPU Board 0,Slot=0,ResourceType=47)

#Mar  9 2018 21:05:53 HUAWEI L3MB/4/FWDRESLACK:OID 1.3.6.1.4.1.2011.5.25.227.2.1.5 The layer 3 resource usage has reached or exceeded 85%.(EntPhysicalindex=67108873,EntPhysicalName=MPU Board 0,Slot=0,ResourceType=28)

END