Alcatel-Lucent omnistack 6300 Guía Del Usuario
Limitation
CLI requires going to the interface command mode to change the table, even if the table is not interface-related.
Interoperability with OmniSwitch 6624/6648 7700/7800 8800
These switches do the same but they use a different table.
For instance OmniSwitch 7700/7800 and OmniSwitch 8800 map the DSCP values to only 4 priority queues.
For instance OmniSwitch 7700/7800 and OmniSwitch 8800 map the DSCP values to only 4 priority queues.
Priority
Queue
0 1 2 3
DSCP
0-15 16-31 32-47 48-63
Packets with DSCP 63 get the highest priority whereas they get priority 2 on OmniStack 6300-24.
There is no DSCP/CoS concept. However, you can modify the DSCP/queue mapping by using the mapping
policies.
The mapping policies will modify both the priority and the egress packet (i.e. the egress 802.1p/ToS/Dscp are
modified based on the ingress 802.1p/ToS/Dscp value, using the “policy map group”)
On OmniStack 6300-24, selecting IP DSCP Priority never alters the egress packets.
3.6 ACL Priority (CoS ACL)
Instead of reading the CoS from the L2 packet (802.1p) or L3 packets (IP precedence or IP dscp), the switch
can use ACLs to map a specific type of packet to a CoS.
With that feature you can give priority for a specific type of traffic.
You can map both IP ACLs and MAC ACLs to CoS.
After mapping an ACL to CoS, the switch still reads the CoS/Queue table to map the CoS value to a priority
queue.
All incoming packets matching an ACL will be prioritized based on the CoS value that is mapped to the ACL.
The outgoing packets are never modified.
Packets that do not match the ACL will still be prioritized with 802.1p, interface default priority, IP Precedence
or IP dscp.
can use ACLs to map a specific type of packet to a CoS.
With that feature you can give priority for a specific type of traffic.
You can map both IP ACLs and MAC ACLs to CoS.
After mapping an ACL to CoS, the switch still reads the CoS/Queue table to map the CoS value to a priority
queue.
All incoming packets matching an ACL will be prioritized based on the CoS value that is mapped to the ACL.
The outgoing packets are never modified.
Packets that do not match the ACL will still be prioritized with 802.1p, interface default priority, IP Precedence
or IP dscp.
Example
To give priority 7 to traffic from mac 00-00-00-00-00-03 (CoS 7 gives queue 7)
To give priority 0 to traffic from ip 2.0.0.3 (CoS 1 gives queue 0)
(See ACL chapter for ACL configuration)
Console(config)# access-list ip standard FROM_IP_3
Console(config-std-acl)# permit host 2.0.0.3
Console(config-std-acl)# exit
Console(config)# access-list mac FROM_MAC_3
Console(config-mac-acl)# permit host 00-00-00-00-00-03 any
Console(config-mac-acl)#exit
Console(config)# access-list ip mask-precedence in
Console(config-ip-mask-acl)#mask host
Console(config-ip-mask-acl)#exit
Console(config)#access-list mac mask-precedence in
Console(config-mac-mask-acl)#mask host any
Console(config-mac-mask-acl)#exit
Console(config)#interface ethernet 1/1
Console(config-if)#map access-list ip FROM_IP_3 cos 1
Console(config-if)#map access-list mac FROM_MAC_3 cos 7
To give priority 0 to traffic from ip 2.0.0.3 (CoS 1 gives queue 0)
(See ACL chapter for ACL configuration)
Console(config)# access-list ip standard FROM_IP_3
Console(config-std-acl)# permit host 2.0.0.3
Console(config-std-acl)# exit
Console(config)# access-list mac FROM_MAC_3
Console(config-mac-acl)# permit host 00-00-00-00-00-03 any
Console(config-mac-acl)#exit
Console(config)# access-list ip mask-precedence in
Console(config-ip-mask-acl)#mask host
Console(config-ip-mask-acl)#exit
Console(config)#access-list mac mask-precedence in
Console(config-mac-mask-acl)#mask host any
Console(config-mac-mask-acl)#exit
Console(config)#interface ethernet 1/1
Console(config-if)#map access-list ip FROM_IP_3 cos 1
Console(config-if)#map access-list mac FROM_MAC_3 cos 7
Limitation
♦ MAC ACL is always executed first. If the same packet matches both MAC and IP ACLs, then packet will be
mapped to CoS defined in the MAC ACL. In the example, packet with mac 00-00-00-00-00-03 and ip
2.0.0.3 will be queued to priority queue 7.
2.0.0.3 will be queued to priority queue 7.