Huawei MA5600 - Smart AX MA5600 T ACL malfunction caused by PPP&DHCP packets SCUB CPU capturing and not processing by ACL

MSAN UA5000 Cases Chapter 2 MA5600T (IP DSLAM) Cases
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29
scription:
LAN switch ------ homegateway ------ MA5600T-----Router ------ Vod Server
The client which under a port of ADSL2+ cannot watch two programs at the same time.
Alarm Informatio
n:
null
Cause Analysi
s:
Possibly have three factors will induce is issue.
1. Has been limited the maximum number of programs could be watch at this port.
2. Homegate cut off those packets concerning IGMP packets.
3. The value of BW was allocated on ADSL2+ port.
Handling Proces
s:
1. Use "display igmp user" command to check this setting of user, we can find out the value of maximum num
b
2. Check the configuration of homegate, we can find out there is no astrict with regard to IGMP packet, so thi
s
3. Use "display igmp program" to check property of programs, we can find out the BW of this program was 5
M
4. Use "display interface adsl 0/3/0" to check the BW that was allocated on ADSL2+ port, we can find out the
c
5. So the user order one of programs would occupied 5Mbit/s BW, and then the residual BW only have 4 Mbit
/
6. We modify this line-rate of ADSL2+ port to bigger, as a result user can watch multi-programs, problem solv
e
Suggestions and
Summary:
null
2.6 Smart AX MA5600T ACL malfunction caused by PPP&DHCP packets SCUB CPU
capturing and not processing by ACL
Title:
Smart MX MA5600T ACL malfunction caused by PPP&DHCP packets SCUB CPU
capturing and not processing by ACL
ID: SE0000348141
Information
Type :
Troubleshooting Cases Quality Level:
C
Update Time: 2008-09-22 11:10:46
Views: 6
Author: Khanachivskyi
Product Family:
Broadband Access
Product:
MA5600T MSAN
Fault Type:
QACL Service
Keywords: MA5600T acl PPP DHCP packets
Permission
Level:
01Huawei Engineers Permission
Phenomenon De
scription:
After configuring acl that denies all the packets on inbound and outbound direction interface still let some pac
k
Test scheme was the following: adsl client------MA5600T(upling GICE port 1)------cisco 3400.
Alarm Informatio
n:
Null
Cause Analysi
s:
The cause - SCUB CPU process PPP & DHCP packets before ACL function. That cause that when adsl clien
t
ystem incorrect work and uplink lan switch will hang.
Target software versions: ma5600tv800r005c32b056, MA5600 V800R005C32B118, MA5600 V800R005C32
B
capture packets from cisco switch are attached
Kiev-Test-HW-MA5600T(config)#display acl 4555
Link ACL 4555, 1 rule
Acl's step is 5
rule 5 deny
Kiev-Test-HW-MA5600T(config)#display packet-filter
{ all<K>|port<K> }:port 0/20/1
Command:
display packet-filter port 0/20/1
port 0/20/1
Inbound:
inbound Acl 3033 rule 1 port 0/20/1 running
inbound Acl 3033 rule 5 port 0/20/1 running