10-24-2012 01:11 AM - edited 03-07-2019 09:39 AM
Hello!
I'm trying to make MGSCP solution.
I have Cisco 7609 with following configuration:
Mod Ports Card Type Model
--- ----- -------------------------------------- ------------------
3 8 CEF720 8 port 10GE with DFC WS-X6708-10GE
5 5 Route Switch Processor 720 10GE (Activ RSP720-3CXL-10GE
7 24 CEF720 24 port 1000mb SFP WS-X6724-SFP
8 24 CEF720 24 port 1000mb SFP WS-X6724-SFP
9 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX
Mod Sub-Module Model Hw Status
---- --------------------------- ------------------ ------- -------
3 Distributed Forwarding Card WS-F6700-DFC3CXL 1.1 Ok
5 Policy Feature Card 3 7600-PFC3CXL-10GE 1.2 Ok
5 C7600 MSFC4 Daughterboard 7600-MSFC4 2.2 Ok
7 Distributed Forwarding Card WS-F6700-DFC3CXL 1.7 Ok
8 Centralized Forwarding Card WS-F6700-CFC 4.1 Ok
9 Centralized Forwarding Card WS-F6700-CFC 3.1 Ok
So, I trying to configure the portchannels with different load-balancing mode: src-ip for port-channel 3 and dst-ip for port-channel 4.
port-channel per-module load-balance
port-channel load-balance dst-ip
port-channel load-balance src-ip module 7
#show interfaces port-channel 3 | i Members
Members in this channel: Gi7/1 Gi7/2 Gi7/3 Gi7/4 Gi7/13 Gi7/14 Gi7/15 Gi7/16
#show interfaces port-channel 4 | i Members
Members in this channel: Gi8/1 Gi8/2 Gi8/3 Gi8/4 Gi8/13 Gi8/14 Gi8/15 Gi8/16
#show etherchannel load-balance
EtherChannel Load-Balancing Configuration:
dst-ip vlan included
mpls label-ip
EtherChannel Load-Balancing Addresses Used Per-Protocol:
Non-IP: Destination MAC address
IPv4: Destination IP address
IPv6: Destination IP address
MPLS: Label or IP
#show etherchannel load-balance module 7
EtherChannel Load-Balancing Configuration:
src-ip vlan included
mpls label-ip
EtherChannel Load-Balancing Addresses Used Per-Protocol:
Non-IP: Source MAC address
IPv4: Source IP address
IPv6: Source IP address
MPLS: Label or IP
But when I check the traffic on the devices I see that Port-channel 4 balanced traffic with src-dst-ip method (and port-channel 3 works fine).
And when I use the test command...
#remote login switch
#test etherchannel load-balance interface port-channel 4 ip 1.1.1.1 2.2.2.2
Computed RBH: 0x5
Would select Gi8/14 of Po4
#test etherchannel load-balance interface port-channel 4 ip 1.1.1.1 2.2.2.3
Computed RBH: 0x4
Would select Gi8/13 of Po4
#test etherchannel load-balance interface port-channel 4 ip 1.1.1.2 2.2.2.2
Computed RBH: 0x6
Would select Gi8/15 of Po4
I've tried to use IOS c7600rsp72043-advipservices-mz.151-3.S3.bin and c7600rsp72043-advipservices-mz.122-33.SRE7.bin
What can I check and reconfigure to resolve this issue?
With best regards,
Valery
10-29-2012 07:39 PM
It was because of this https://supportforums.cisco.com/docs/DOC-17855 (look per module load balancing).
The point is the hash decision about EGRESS EC load-balancing is taken on the INGRESS line card. It's irrational, but true
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