Performance Problems on UBR10k

hi all, we have an ubr10k, the problem is low performance in the clients, ping lost and delays in loading pages

we have 4 bundles, in one of the bundles we have 5 ip pools /24.

the test we did was remove 4 of the pools and the problem was solved.

any idea why this can happen ?

I copy the run

nave01cm02#show interfaces bundle 80.100
Bundle80.100 is up, line protocol is up
Hardware is Cable Virtual-bundle interface, address is 68ef.bd85.b0da (bia 0000.0000.0000)
Internet address is 36.3.168.1/22
MTU 1500 bytes, BW 26000 Kbit, DLY 1000 usec,
reliability 255/255, txload 221/255, rxload 49/255
Encapsulation MCNS
ARP type: ARPA, ARP Timeout 04:00:00
Keepalive set (10 sec)
Last clearing of "show interface" counters never

nave01cm02#show running-config interface bundle 85.100
Building configuration...

Current configuration : 544 bytes
!
interface Bundle85.100
ip vrf forwarding ***.***.***
ip address ***.***.***.*** 255.255.255.0 secondary
ip address 36.3.251.33 255.255.255.224 secondary
ip address ***.***.***.*** 255.255.255.0 secondary
ip address ***.***.***.*** 255.255.255.0 secondary
ip address ***.***.***.*** 255.255.255.0 secondary
ip address 36.3.196.1 255.255.252.0 secondary
ip address ***.***.***.*** 255.255.255.0 secondary
ip address 36.3.192.1 255.255.252.0
cable dhcp-giaddr primary
cable helper-address 190.220.191.36
cable helper-address 190.220.191.37
end

nave01cm02#show running-config interface bundle 85
Building configuration...

Current configuration : 111 bytes
!
interface Bundle85
no ip address
cable arp filter request-send 3 2
cable arp filter reply-accept 3 2
end

nave01cm02#sh
nave01cm02#show run
nave01cm02#show running-config int
nave01cm02#show running-config interface cab
nave01cm02#show running-config interface cable 8/1/0
Building configuration...

Current configuration : 2251 bytes
!
interface Cable8/1/0
downstream Integrated-Cable 8/1/0 rf-channel 0-3
cable mtc-mode
no cable packet-cache
cable default-phy-burst 0
cable bundle 85
cable upstream max-ports 4
cable upstream bonding-group 1
upstream 1
upstream 2
upstream 3
attributes A0000000
cable upstream 0 connector 0 shared
cable upstream 0 frequency 20800000
cable upstream 0 channel-width 3200000 3200000
cable upstream 0 threshold corr-fec 5
cable upstream 0 load-balance group 20
cable upstream 0 docsis-mode atdma
cable upstream 0 minislot-size 2
cable upstream 0 range-backoff 3 6
cable upstream 0 modulation-profile 223
cable upstream 0 attribute-mask 20000000
no cable upstream 0 shutdown
cable upstream 1 connector 0 shared
cable upstream 1 frequency 25600000
cable upstream 1 channel-width 6400000 6400000
cable upstream 1 threshold snr-profiles 24 0
cable upstream 1 threshold corr-fec 5
cable upstream 1 load-balance group 20
cable upstream 1 docsis-mode atdma
cable upstream 1 minislot-size 1
cable upstream 1 range-backoff 3 6
cable upstream 1 modulation-profile 224 223
cable upstream 1 attribute-mask 20000000
no cable upstream 1 shutdown
cable upstream 2 connector 2 shared
cable upstream 2 frequency 32000000
cable upstream 2 channel-width 6400000 6400000
cable upstream 2 threshold snr-profiles 24 0
cable upstream 2 threshold corr-fec 5
cable upstream 2 load-balance group 20
cable upstream 2 docsis-mode atdma
cable upstream 2 minislot-size 1
cable upstream 2 range-backoff 3 6
cable upstream 2 modulation-profile 224 223
cable upstream 2 attribute-mask 20000000
no cable upstream 2 shutdown
cable upstream 3 connector 2 shared
cable upstream 3 frequency 38400000
cable upstream 3 channel-width 6400000 6400000
cable upstream 3 threshold snr-profiles 24 0
cable upstream 3 threshold corr-fec 5
cable upstream 3 load-balance group 20
cable upstream 3 docsis-mode atdma
cable upstream 3 minislot-size 1
cable upstream 3 range-backoff 3 6
cable upstream 3 modulation-profile 224 223
cable upstream 3 attribute-mask 20000000

thanks a lot